Is the AI boom a bubble waiting to pop? Here's what history says. Investors are increasingly asking if we're living through another financial bubble that's destined to burst. As the artificial intelligence trade continues to push the stock market to new highs, investors are increasingly asking if we're living through another financial bubble that's destined to burst. The S&P 500 Index jumped 16% in 2025, with AI winners Nvidia, Alphabet, Broadcom and Microsoft contributing the most. But at the same time, concerns are mounting about the hundreds of billions of dollars Big Tech has pledged to spend on AI infrastructure. Capital expenditures from Microsoft, Alphabet, Amazon and Meta Platforms are expected to rise 34% to roughly $440 billion combined over the next year, according to data compiled by Bloomberg.

Could Ukraine hold a presidential election right now? Will Europe use frozen Russian assets to fund war? How can Ukraine rebuild China ties? 'Ukraine is running out of men, money and time' Trump spurns Kremlin's Putin residence attack claim, Russia kills 2 in Kyiv United States President Donald Trump has dismissed claims that Russian President Vladimir Putin's residence had been attacked by Ukraine as the war grinds on, saying he did not "believe that strike happened", after having initially accepted the Kremlin's version of events at face value. On Sunday night, Trump, on board Air Force One, told reporters that "nobody knew at that moment" whether a report about the alleged incident was accurate.

When you purchase through links in our articles, we may earn a small commission. CES 2026 live: Wild tech, weird gadgets, and the laptops everyone's talking about PCWorld's staff has descended upon Las Vegas to bring you all the must-see PC sights from CES 2026. It's that time once again: CES 2026 is here. Think of CES like a harbinger of what's next in technology. Every January, the industry descends upon Las Vegas to pull back the curtain on the products that will power the upcoming year.

Could Ukraine hold a presidential election right now? Will Europe use frozen Russian assets to fund war? How can Ukraine rebuild China ties? 'Ukraine is running out of men, money and time' Russian forces launched an air attack on Ukraine's capital, Kyiv, on Monday, killing one civilian in the first reported death in the city this year, according to the Ukrainian military. Russia's military also carried out drone attacks on northeastern Ukraine on Sunday, killing at least two people in the Sumy region and wounding three in the Kharkiv region, according to local officials.

When you purchase through links in our articles, we may earn a small commission. With everything from ultra-precise presence detection to Z-Wave LR integration, Xthings' Ultraloq smart locks aim to serve DIYers and security pros alike. Smart home brand Xthings is rolling out an ambitious lineup of new Ultraloq smart locks at CES, ranging from locks with cutting-edge biometric access to models designed for professional Z-Wave installations. The company says the new products are built to support both homeowners looking for advanced convenience and service providers managing connected security systems. Leading the pack is the Ultraloq Bolt Mission, a Matter-certified smart lock that uses Ultra-wideband (UWB) technology to detect a user's precise location and automatically unlock when the user is physically at the door--not just nearby with their phone in a pocket or bag.

Some major retailers and independent stores have introduced AI body scans, CCTV or facial recognition equipment to identify crimes like shoplifting.

We study multi-user contextual bandits where users are related by a graph and their reward functions exhibit both non-linear behavior and graph homophily. We introduce a principled joint penalty for the collection of user reward functions $\{f_u\}$, combining a graph smoothness term based on RKHS distances with an individual roughness penalty. Our central contribution is proving that this penalty is equivalent to the squared norm within a single, unified \emph{multi-user RKHS}. We explicitly derive its reproducing kernel, which elegantly fuses the graph Laplacian with the base arm kernel. This unification allows us to reframe the problem as learning a single ''lifted'' function, enabling the design of principled algorithms, \texttt{LK-GP-UCB} and \texttt{LK-GP-TS}, that leverage Gaussian Process posteriors over this new kernel for exploration. We provide high-probability regret bounds that scale with an \emph{effective dimension} of the multi-user kernel, replacing dependencies on user count or ambient dimension. Empirically, our methods outperform strong linear and non-graph-aware baselines in non-linear settings and remain competitive even when the true rewards are linear. Our work delivers a unified, theoretically grounded, and practical framework that bridges Laplacian regularization with kernelized bandits for structured exploration.

When you purchase through links in our articles, we may earn a small commission. Boasting edge AI plus Google Gemini processing in the cloud, each of the Xthings Ulticam products will support Matter. Xthings is expanding its Ulticam smart camera series with a fresh slate of models designed to boost security coverage and cut down on noisy low-value alerts. Among the highlights are a long-range camera system built on Wi-Fi HaLow, a powerful floodlight camera, a wire-free model with always-on video, and an upgraded flagship indoor/outdoor camera that integrates both on-device and cloud AI. The company says its new cameras are built around what it calls Intelligent Vision, a blend of object detection on the device (powered by onboard AI) at the edge of a user's network, and cloud-based contextual and threat analysis powered by Google Gemini.

When you purchase through links in our articles, we may earn a small commission. Ultramarine robotic pool cleaner joins Ecovacs' home robot lineup Known for its robot vacuum cleaners, Ecovacs shipped its first robot mower in 2023. The Ultramarine is the company's first foray into robotic pool cleaners. Ecovacs, known for its robotic vacuums, lawn mowers, and window-cleaning systems, is taking the plunge--literally--with its first robotic pool cleaner: the Ultramarine. Unveiled at CES 2026, this marks the company's first entry into the space, with a model the company describes as "built from the ground up" to address frustrations users have with existing robotic pool cleaners on the market; namely, poor coverage, overly complicated control systems, and unacceptable device longevity.

When you purchase through links in our articles, we may earn a small commission. Maytronics says its latest Dolphin Eon-series can scrub areas such as a swimming pool's steps and shelves as effectively they clean its depths. Maytronics is showing an expanded line of Dolphin robotic pool cleaners at CES this week. The Dolphin Eon series promises to work in shallow water--areas with as little as 8 inches of coverage--making them usable on steps, shelves, ledges, and zero-entry slopes (at least up to a point). More typical pool robots must be completely submerged in order to properly operate, limiting some larger robots to cleaning pool surfaces with a minimum water depth of 14 inches, leaving shallower areas for you to scrub.