Glasses-free 3D has taken several forms, but most have a critical flaw -- viewers have to stand in predefined locations to get the effect. That just won't do, so Microsoft's prototyped a new approach, and it's one of the wildest we've seen. Taking a cue from Project N we mean Kinect, cameras track the face while a special wedge-shaped lens traps bouncing light, and after the beams have reac
