I think most people heard about Microsoft Surface. (If not check http://www.microsoft.com/surface/) This machine will cost around 5000 to 10000 dollars but hey it's a really cool device. Now on my daily journey surfing the internet I came across a really cool project that everyone can try at home if you have knowledge about .net and own a Nintendo Wii to create your own multi touch user interface!
Since the Wii remote is using a Bluetooth connection towards it’s remote it’s also possible to connect it to your own pc. The Wii remote has an infra red sensor which can sense multiple infra red light sources at the same time.
How this all works is explained at http://www.cs.cmu.edu/~johnny/projects/wii/
There is also a C# sample code how to connect your pc to your Wii remote and how you’re able to do cool stuff with it. If I have enough time in the coming weeks I’ll try to test it myself if I can get my hands on some infra red LED’s.
Have fun!
Geert van der Cruijsen