Seems like from the various hardware sites that ivy bridge for desktop seems to provide maybe 2-5% improvement. Obviously the improved integrated graphics don't really apply to desktops. For laptops it seems like a good upgrade, around 15% better than SB, 50% better graphics and lower power consumption so battery life is improved. Going by just the increase in processing power waiting for the ivy bridge imac would have been a waste of time. Lets hope they do a redesign and include some nice graphics card options instead!