Motion control startup Leap Motion has demoed its Leap 3D motion control system, which can track motion to around 0.01mm accuracy — 100 times more accurate than the Kinect. Rather than taking Microsoft's approach, Leap Motion creates a personal 3D workspace of about four cubic feet. The Leap consists of a small USB device with industry-standard sensors and cameras that, in tandem with the company's software, can track multiple objects and recognize gestures.