That tech is something called Project Natal. Developed by Microsoft, for its Xbox 360 games console. Project Natal will use modern motion tracking software and hardware to allow the user to control games/objects without using controllers.
http://www.xbox.com/en-US/live/projectnatal/ - The official Microsoft website for Project Natal
http://www.youtube.com/watch?v=oACt9R9z37U - A youtube link to the Project Natal in action. Looks good.
The reason im posting about this, for our application were going to develop a webcam section which reads your movements and hand locations to tell the user whether their playing correctly. However the motion tracking code is very tempermental.
If we could use this sort of technology we would be able to perfect this feature.
