Last September, Microsoft announced the Kinect's availability in China, but the catch was there would be no Xbox 360 to go with the motion-sensing peripheral, meaning only the developers could make the most out of the sensor on a PC.

ENGADGET: China's complicated history with video games: when a ban isn't really a ban

In many cases, workers can opt out of participating in the sensor studies.

WSJ: Tracking Sensors Invade the Workplace

In 2004 Weatherford was first to roll out a new twist in optical sensor technology.

FORBES: Magazine Article