The Optimus Keyboard, apart from having a very cool name, is one of the greatest pieces of product design I've seen in ages. While still only a prototype, the idea is to use OLEDs as keycaps, showing what each key is actually controlling at any particular time. This appears to range from simple language switching and odd characters (which would be a huge blessing for those of us who need to use characters not on your standard 104-key setup), into more functional symbology for playing games.

Sure, this update to the old concept of the keyboard overlay will probably cost thousands when released, but the cool factor alone will probably drive enough sales to cover costs. I know I'll want one. Go check out the renders and see if you don't agree.