A keyboard with OLED keycaps that change depending on the context would be reason enough to get a new laptop altogether, even though I have a brand new one.
As someone who context-switches from XCode to IntelliJ to Photoshop to Emacs, sometimes I confuse the shortcuts, and I don't learn more shortcuts because I'm afraid they will not carry over to other programs. Having discoverable shortcuts would be amazing.
https://www.google.com/search?q=Optimus+Maximus+keyboard&tbm...
https://en.wikipedia.org/wiki/Optimus_Maximus_keyboard
It exists but hasn't taken over the world.
Apparently Apple's working an OLED display above their keyboard.
http://9to5mac.com/2016/05/23/apple-prepping-thinner-macbook...