This project is about video-wall which uses a combined power of GStreamer, and Xinerama. In this project, every group of 4 monitors are controlled by one machine.
Beagle board is easy to transport and it has a capability of a PC. Controlling a group of 4 monitors using beagle board needs less room and is handy. Beagle board is also capable of producing HD graphics.
The same thing might be possible with Bealge Board. On the IRC channel, # bealge, IRC nicks koen, av500, were discussing about it.
The discussion thread can be found at http://www.beagleboard.org/irclogs/index.php?date=2009-11-23#T13:03:01