On this keyboard, every keycap is an OLED screen. It looks like just a design fantasy, but it makes perfect sense. Imagine if your key labels changed to tell you, when you were running Word, what formatting codes were hidden in each key; or, when you were playing Half-Life, which keys did what. I'm sure someone out there is working on this. Like I said, I want it.
Either that or the completely blank Ray Charles keyboard.