This morning, Apple revealed their research into integrating a display into devices like the Magic Mouse and Trackpad. The same team is also shown to be working on another project that would bring an optional full sized virtual keyboard to the iMac. The patent covers Apple's research into advancing a haptics system that would finally provide users with a sense that the virtual keyboard is in fact a regular keyboard. Of course one of the key advantages of such of a system isn't revealed in this patent, but rather a 2006 patent wherein they illustrate the possibilities of a virtual keyboard morphing into other types of inputs like a gaming pad or a musical keyboard. That's where the real fun begins.