CES 2017 had it all - from the LoveBox to the smart sommelier, and Bluetooth in a bottle to underwear unplugged There are gadgets which, once you've seen them, seem like they might be really useful. And others which just make you wonder, why? Crowdfunding campaigns are full of them - and there was also no shortage at CES 2017, the world's largest consumer electronics show held in Las Vegas, US, in January.