I've seen a few videos of this technology over the past couple of months. It looks quite interesting, though it would require a complete redesign of desks, since no one would actually want to reach up to a perpendicular monitor all the time.

Word is that Mac's OS 10.5 (Leopard) will have basic touchscreen components for technology that is in the pipeline for end of this year. So, we could actually see this stuff alot sooner than you might think.