Oh some GAFers explained to me....
"He's saying 1080p without MSAA would be less hardware intensive than what they're doing now with 800x4xMSAA."
So the guy said that 1080p without MSAA uses less hardware than what they are running now 800p with 4xMSAA... so 1080p with 2xMSAA is one option before the performance gets trouble with 1080p with 4xMSAA.