Re: Ordered
"Stick a LED under each key and the battery life is dramatically cut. - Unacceptable"
Actually no, if you that you can radically reduce the brightness of every LED and therefore radically reduce the power you need to drive it. In essence it doesn't matter how many LEDs you need, what matters is the total amount of light you need.
The Pyra, for example, uses a middle ground. It uses some LEDs for the keyboard, with a diffuser in between.