Wow, two great cards to choose from at such a low price. Unfortunately for ATI and nVidia, I'm happy with my 8800gt, and I'm probably not upgrading till Christmas, so this may not affect me too much.
ATI should come out with more cards like the 4850, cuz so far their choices are far too little. My only problem is that ATI has worked so hard to come out with only two products that can compete with Nvidia's high-end and give them a run for their money (besides some of the older ones like the 3870 X2). I"m not too sure I can fully trust ATI in the future if nVidia can make many cards and match them easily.
It's only now that prices can come down from teh competition, which is what we like