The Optimus keyboard concept is quite simply stunning and if they can get it into production as promised, I'll be found scouring the backs of sofas for every penny in order to get one as it's bound to cost a fair packet. Each and every key has its own OLED screen which can be customised to display whatever you want on it. The examples given by the designers, Art. Lebedev Studio, include all the keys with Photoshop shortcut icons and Quake keys (e.g. wasd changed for arrows).