"AMD seems to think Eyefinity could be a pretty compelling feature for some folks, and no doubt playing DiRT 2 on a 24+ megapixel display is an interesting experience, at least. Part of AMD's pitch for Eyefinity is based on the realities of monitor pricing: three relatively nice displays could be had for the price of a single 34" high-density monster. So why not build a gaming setup with three displays instead?
Although the demo we saw today was based on conventional Dell 30" monitors, AMD has been working with Samsung on Eyefinity support and has plans involving monitors with very narrow bezels, so that many displays can act together as one with a minimum of visual interruption. The company may also incorporate a feature in its graphics drivers to compensate for the visual offsets caused by bezels. Still, if this takes off, three-display setups will almost certainly be the most popular variation, because four- and six-display configs will have the display edges interruputing the dead-center focal point—where the crosshair goes in first-person shooters, among other things."