Each January, tech companies from around the world gather in Las Vegas to show off their latest efforts at CES, formerly called the Consumer Electronics Show, the biggest gadget show of the year. While the products and demos showcased at CES don't always reflect the technology you'll be able to buy in the near future, the show does offer some insight into where tech giants are putting their time and resources. This year was all about improving communication between smart home gadgets, making the car feel more personal, and putting screens everywhere imaginable. Here's a look at some of the coolest products we came across on the CES showroom floor. L'Oréal's UV Sense is a tiny sensor capable of detecting ultraviolet exposure that's small enough to wear comfortably on your fingernail. The sensor itself is battery-free and includes an NFC antenna, a temperature sensor, and a UV sensor.

Jennifer Jolly's coolest gadgets from CES you'll actually see in your home this year. A New Year means one thing in the world of gadgets -- a trip to Las Vegas for CES. It's the enormous consumer electronics show packed with nearly 50-football fields worth of shiny new tech toys. Somewhere inside the cavernous convention center crowded with TV's we can't afford, concept cars we'll never drive, and stupid "smart" things we'll never use (Alexa-enabled toilet…really?), there's always a handful of gadgets that really can hit the jackpot of product-perfection. That's what I set out to find early-on here in Las Vegas. Here are my favorites so far.

Wallpaper-thin TVs, drones that can dive underwater, and a computer the size of a credit card. Those are only a few of the gadgets that have been unveiled this week at the annual CES gadget expo in Las Vegas, where companies in the tech, automotive, and home appliance industries flaunt their latest innovations. Many high-profile tech companies, like Apple and Google, typically hold their own separate events throughout the year to unveil new products rather than debuting new wares at CES. Still, the annual convention, now in its 50th year, often provides a look at the next big trends in tech. The biggest themes at CES this year include self-driving cars, home robots, and tons of integrations with Amazon's Alexa voice assistant.