4 researchers at the University of Washington leverage wireless signals to enable whole-home sensing and recognition of human gestures. It's called WiSee. Not WiWillSee. WiSee.
We can probably credit Nintendo for kicking off the most recent push to advance motion control gaming. Indeed, the Nintendo Wii was the first gaming console to bring motion control to the mainstream public.
A German team has developed printable sensors that could allow electronic devices such as phones to be controlled just by pointing a finger.