What if CS4 is GPU-accelerated and offers the same (or more) performance as the jump to universal binary? Would that be an incentive to buy the upgrade?
I'm curious about how slow people feel Photoshop is; it works really quickly for me doing web-based stuff at 1 or 2 megapixels. Does it slow down working with 90 megapixel 300dpi images?
Photoshop CS3 was a nice improvement because it was a universal binary, but I doubt i will be upgrading to CS4 when it is released.