Microsoft researchers develop a sensor that reads electromagnetic fields as motion.



From PCWorld:

Microsoft showed off their new tech, at the Conference on Human Factors in Computing, which can detect the electromagnetic field produced by a human body as wells as the ones produced by electrical appliances and power cables. The sensor, which can be worn on the neck or wrist, is connected to a computer that can record and recognize field changes keyed into particular poses.

  Microsoft Looks at New Motion-Sensing Technology