Called the IllumiRoom, bullets fly through the room, environments appear off screen using projections and a Kinect motion sensor monitors the position of the user.

BBC: Star Trek 'holodeck' in the living room?

The LS3 uses a gyroscopic sensor near the head and force and position sensors on each leg to maintain balance in motion.

FORBES: Magazine Article

Seat belts could, in the 100 milliseconds of a crash, avoid breaking an old lady's ribs by calibrating how much force to apply to a body after gathering sensor data on the car's speed and deceleration and the weight and position of the occupant.

FORBES: Smart Dummies