There really is an enormous world of USB-powered objects, most of which are on the "would I really use this?" side of the geek-o-sphere. My most recent discovery, the USB Heated Slippers are marketed at those of us who spend half the day complaining that our feet are cold.
The previous model had a single slipper for both feet, but the newest edition features two separate slippers, which allows you to relax in a variety of positions. According to the makers, the slippers are safe because they warm your feet gradually and softly by USB power.
So, are they totally geeky, or geek chic?