Yesterday I came up with the idea of using e-paper on top of keys of a keyboard in order for it to be changeable on the fly. Doing a search online however revealed I was at least two years too late. Day late, dollar short I guess. That could be a great new feature for Macbook Pros. Similar to how backlit keys used to be a Pro-only feature. I also came across an article of Apple having an idea for an OLED keyboard. Either one sounds fantastic to me.