Th next phase in motion capture is “Organic Motion Capture” which is the ability to capture the movements just as normal motion capture but with out the use and need for sensors, suits, or markers. This feat is accomplished by the use of new high speed cameras and visual software ( Auto-desk Motion Builder ). This new technology allows for more spontaneity and realism to otherwise rehearsed skits.
http://www.organicmotion.com/applications/animation
http://gfxspeak.com/2011/08/09/organic-motion-shows-off-new-technology-at-siggraph-vancouver/