This is just down right disgusting! (in a good way, not a pedophile way). This guy has managed to spread Quake 3 across 24 different LCD screens simultaneously.
The system is driven by 12 linux servers (2 monitors per server) using Distributed Multihead X (DMX) and Chromium. Chromium distributes the OpenGL rendering from the head node to all of the servers. The game runs fairly fast, though some lighting effects had to be turned off and Chromium is having some trouble with the mouse. Even so, playing the game is an awesome experience.
Quake 3 running at 10240×3072 resolution at 15-30 FPS
A view of our 12-node Linux cluser resting behind the display.