Great Eye-toy interaction with PS3

Brian D. Crecente describes the , PS3 game demonstrations that Sony recently gave. The point I am interested in is the use of the eye-toy to interact with the game:

The ones I found most impressive include the demonstration of real world objects being used to manipulate the game world with the help of the Eye Toy camera. In the demo, the creator of the Eye Toy held up two plastic cups and used them to move their digital equivalents on the giant screen behind him. Using the Eye Toy, he was able to scoop up water and pour it from cup to cup. He also tossed sprays of water across a tub filled with floating plastic toys.

Closer and closer to an mass-market implementation of tangible interaction richer and more original.