http://news.bbc.co.uk/player/emp/2.10.7938_7967/player.swf
In two to three years we will have the next gen Surface. It will feature a second projector that will project images above its screen allowing to overlay images on each other. Infrared sensors will let you control the Surface without touching it. According to Erik Klimczak, creative director of Clarity Consulting (they develop apps for the Surface), the new device will feature HD cameras too.
Click here for more on the Surface 2