From colour-shifting cars to digital art TVs and stress-predicting watches, the annual Consumer Electronics Show in Las Vegas, which opened on Wednesday, offered its usual mix of wacky, visionary and desirable goods. Here are some of the highlights. The non fungible token, which confers ownership of a unique digital item such as a work of art, became a multi-billion dollar market in 2021 and Samsung announced a new TV feature that allows enthusiasts to browse, display and buy NFT-based art. Given how much some NFTs cost, you may not have much left over to pay for the screen. Nowatch has produced a smartwatch that monitors your cortisol levels to predict stress.