When you're obsessed with finding the most awesome gadgets and devices, there's nothing more heartbreaking than the word "concept." Not only does it mean you're not going to find a given device in stores—it usually means you're never going to find it anywhere.
Of course, encouraging the designers of tomorrow to think up new designs and concepts is vital to innovation. It's just really sad when you come across something particularly brilliant only to discover it's nothing but a figment of a design student's imagination. So here are 10 of our favorite concepts (and biggest disappointments) from the past year. You still can't buy any of them.