Yes, but non-intrusive body movement capture is far from a pipe dream. Microsoft Kinect is doing pretty good with IR structured light, and it's one of the most

Yes, but non-intrusive body movement capture is far from a pipe dream. Microsoft Kinect is doing pretty good with IR structured light, and it's one of the most active research areas in computer vision. It's worthwhile to pursue research that assumes cheap non-intrusive full body motion capture will become widespread.