While its motion sensing capability was pretty state of the art when it came out, Sony contended that the rumble (vibration) feature from previous console controls would interfere with it, so it was done away with -- until the DualShock 3 was developed.

CNN: What should I get for my family's PS3?

Patwari's new study points out pros and cons of adding wireless detection of breathing to the motion-detecting capability.

ENGADGET: Researchers use wireless network to monitor breathing, could save lives