Check out this laser virtual keyboard which connects via bluetooth, the laser from a laser projecting device that is connected to your PC / Desktop is displayed in the form of a keyboard layout. The keyboard can be displayed on any type of surface (wow!) and I think what is clever about it as you will see in the video, is that touching the keys will give you a sound feedback letting you know an input has been sent whereas just placing your hand over the keys without touching the surface won’t induce any input or recognition!

[via Techeblog]