I'm still betting that Bulldozer's performance will trail off in gaming when multiple GTX 580's and ultra-high resolutions become factors.
Sure , i expect it to with sandy bridge . Your most likely going to want SB-E or ivy bridge for multiple gtx 580s .
I expect bulldozer will be fine for me with a 7x00 series single gpu card mostly because i only game at eyefinity resolutions and i will be gpu limited.