Jeff Han's multi-touch, mult-user eight foot wide display/interface

In the continuation post below is an impressive 4 minute video of Jeff Han demonstrating his company's eight foot wide multi-touch, multi-user display/interface, and you can read more about touch screens in this 4/9/2008 piece in the Economist. An early prototype for the screen was developed by Han at New York University's Courant Institute of Mathematical Sciences. Once you've got the general idea from the video, skip to the final minute for Han's insights into the difference between 2-dimensional and 3-dimensional interfaces.

With thanks to Dick Moore for pointing out the video.