The 'advantage' issue is moot in practice. Competitive/tournament players do not use multi-monitor when they have the option, the FPS hit is too large for upper echelon gaming.The perceived issue of 'advantage' can be addressed too, let everyone use FOVs up to at least 130, regardless of resolution or screen format. Like I said earlier, BF3 (as does BFBC2 and PS1) supports multimon perfectly, and there was no whining about multimon gamers in those games.
The primary reason we multi-mon players stick with it is immersion. The immersion cannot be overstated, most multi-mon players, including myself, can't go back to single screen, and don't play games that don't support it.
Just please don't be quick to whine without trying it, and ruin for us the game we've been waiting half a decade for.
If we happen to have any of the devs reading this... guys, please go buy a few more monitors on the companies dime and try it out! At least steal your cubicle neighbors monitors while he's off at lunch. Do a triple projector setup at the next demo/showoff and you'll have gawkers for miles. Someone else found this and it's excellent:
http://developer.download.nvidia.com...ticesGuide.pdf