These were some of the most extravagant TV concepts at CES, from a screen that unfurls from your ceiling to a rotating model inspired by smartphones

· The biggest tech showcase of the year, CES, was in Las Vegas this week.
· The show is the traditional venue for tech companies to show off new products, and introduce concepts that won't make it to the market for a while.
· This year, TVs could do way more than sit in a living room and look pretty. Companies showed off...