At E3 Microsoft announced to the gaming masses a new project, along with Steven Spielberg, a device to do full body and motion tracking. If it works properly its going to be one impressive shift in game control. However when you move this sort of technology to standard virtual worlds, we start to see that we can remove some of the problems people have in virtual worlds with the keyboard puppetry and control. As you can see from this extract.

“This incredible new experience is made possible thanks to the Project Natal Sensor, which combines an RGB camera, depth sensor, multi-array microphone and custom processor running proprietary software all in one device. Existing cameras and controllers only trace movement in 2D, but Project Natal tracks full body movement in 3D and responds to commands, directions… even shifts of emotion in your voice!”

Above from http://www.xbox.com/en-GB/news-features/news/Controller-free-gaming.htm