The Pro goes one step further than the HD by offering a glass lens (in place of plastic) and a sensor able to pick up more subtle motion. (tomsguide.com)
The broad, sweeping motions used with the Kinect and similar technologies would likely not be suited for anything requiring subtle motions such as typing or any long - term activity that can tire your arms if you keep them raised too long. (scientificamerican.com)
Named for the mythical Gorgon sisters, whose stares turned anyone to stone, the system will capture minute detail and subtle motion over an area the size of a small town, according to Robert Marlin, Air Force deputy director of Intelligence, Surveillance, and Reconnaissance Capabilities. (discovermagazine.com)