It's probably the level of concentration required, but these kids do not look nearly as excited about what they are doing as I think they should.
For the last two years, University of Illinois at Chicago graduate student Arthur Nishimoto has been working on this incredible-looking video game based around a multi-touch interface. According to the YouTube page, the game:
... explores how a real-time interactive strategy game that would typically rely on complex keyboard commands and mouse interactions be transferred into a multi-user, multi-touch environment. Originally designed for use with TacTile, a 52-inch multi-touch LCD tabletop display, "Fleet Commander" game play has been ported to EVL's 20-foot wide multi-touch LCD wall, Cyber-Commons. "Fleet Commander" uses Processing, an open source programming language.
There's more about the game's development at Nishimoto's website. Also: In before the Orson Scott Card jokes!