i remember the older matrox card, with 3 head. I played a couple games that supported it, and it is nice, lots of viewing area, adds imersion to the game. For fps, it is a toss up, rpg, with pvp, i would say no. But like Graw, or splinter cell, it would be sweet, it adds alot of imersion into the game, and as of today, that is something us gamers are demanding.
I myself am gonna try it. i run 4 monitors, off my system, 3 side by side, and a 4th taped ontop of my center screen. IT ROCKS for my work, but opbiously doesnt play games.. I would like some more imersion, 3 screens makes you very concious on your surroundings, and works your perphial system to the max. IE imersion.. (forgive the spellings, just drove 12 hrs, so tired)..