This was something interesting I came across during my technological research and thought it'd be worth making a note of. The Wii Remote, just like the Kinect, can be utilised for more interesting things. In this example, the Wii Remote is hacked to provide remote control over a projected interface.
Using infrared (IR) light pens and the Wii Remote, it is possible to create very low-cost multi-point interactive whiteboards and multi-point tablet displays. Johnny Chung Lee, Carnegie Mellon University. The software can be downloaded at http://johnnylee.net