Part of 7 actually helps boost performance to some extent with older AGP cards even while most now will be looking at benchmarks for the latest model cards when making the comparisons. Bring 'em on!
What will likely prove to be a benefactor for 7 along with the parallel gpu/cpu cophasing will be the fact that 7 is lighter on it's feet in a variety of ways. Yet try to convince some diehard XP fans that 7 has a lot more to offer now and actually surpasses the previous versions. Some are starting to take notice!