Dave Forbes' LED TV coat is what it sounds like: a gigantic wearable TV, made up of LEDs wrapped around a lab coat. Sure, its 160x120 resolution isn't going to compete with an HDTV anytime soon, but you can't wrap an HDTV around you. It works by being plugged into an iPod or DVD player, and it's all powered by a 12V battery.
Dave built it to wear to Burning Man, where he will presumably do weird stuff with it. But for now, he's using it to screen The Simpsons as he walks around, which is as good as use for a TV coat as I can think of.