Check out this patent for a PS3 Wiimote device which can be split into two to suit different gaming methods. The technology is similar to Nintendo’s Wiimote, featuring accelerometers, LED-based tracking etc. One of the unique functions of the controller is the ability to send out ultrasonic frequencies that can determine the absolute xyz position. Will we ever see this from Sony? You can bet on it, but likely in an updated form. Everybody is trying to keep up with the Wii while making motion based games uniquely their own.

[PS3 Fanboy]