An anonymous reader writes "It's not just Microsoft investigating full body, markerless motion capture. Sony has enlisted the help of Swiss firm Atracsys to develop similar technology. Sony has openly discussed the technology with New Scientist, and has realistic expectations for the new system — it can capture broad body gestures but not individual fingers. That's just one trade-off needed in order to develop a real-time system that anyone can use, according to a markerless motion-capture expert." It's still in the early stages of development, but the accompanying video shows the use of face-recognition software as well. The demo game has players moving their heads left or right to position their character, and then smiling to "catch" an object.