Im gonna have to call shenanegans on that resolution.  While that is what the monitor cluster is capable of displaying, it is not what the game is running at.  I'm sure the game isn't running at that resolution, if it's run by a single computer.  If they use a bunh of comptuer to render each screen, then the framerate would be in the high 100's if not higher.  It still looks like 115 to me.  The video is too smooth to be 15 frames a second.
And I would still take the projector, because I think it's better.
- One continuous image.
- Scalability.
- Portability
- Cost.
We have something similar here at Purdue, a 4*3*2 3D projector wall.  The way it works is there is an array of 4-3 screens each with 2 projectors that produce a 3D image.  Check it out.
http://www.envision.purdu....edu/pdfs/Section%205.pdfThis is cool too.
http://www.envision.purdu....edu/pdfs/Section%203.pdf