nordlead on 09 March 2010
I'll expand.
The same way that the PSWand uses the camera to determine depth (size of the glowing orb thingy), the Wii Remote uses the IR sensor to determine depth (distance between the two IR signals on each side of the sensor bar). Both controllers essentially do the same thing using a different method. The Wii Remote can't constantly watch the sensor bar (as you point away from the screen) but every time you point at the screen it can be recalibrate.
