What would anyone need TWO 4870x2's for?

I guess everyone has 30 inch monitors and won't step down from 8xAA at 2560 resolution.

Honestly, except for some instances in Crysis, I don't see where a single 4870 wouldn't be enough in resolutions of around 1680. Let alone FOUR of them. All games are console ports. Even a 8800GT I found to be quite enough, if you are content to play at low AA levels.

Buy one 4870 and enjoy it. It's more than enough for everything.