PointSwitch, from Israel’s PointGrab is designed to control home appliances via pointing and gestures. The PointSwitch chip can detect gestures up to 15 feet away and under all lighting conditions. PointGrab is working with manufacturers to embed its chips in “smart” appliances.
http://news.cnet.com/8301-11386_3-57615789-76/pointgrab-brings-gesture-control-to-home-appliances/