The 9700 launch was such marvelous, I'll always remember my reaction when I saw the first benchmarks. Back then I barely had decent knowledge about GPU technology and how it worked, but it didn't take Einstein to understand that something big was happening.
If G80 is the new 9700 of our time, then all I can say to nVidia is good job guys.
I've always been with ATi since I bought my 9800 Pro in 2002 I believe (or 2001, can't remember exactly, I'd have to look at the bill again). And I intend to stay loyal in exchange of their great consumer support (well for me anyway). However if nVidia manages to do better than R600, I'll be interested by a change, I'm not afraid to say. The only "problem" I'd have though, is that if the G80's power consumption information is true, I will also have to hurt my wallet for yet another Power Supply (when I bought my 550 HE, it was because I first had a CrossFire set-up, and then changed motherboard and sold my previous GPUs for money to buy more important things). I doubt that my 550 HE will be able to give enough love to the G80, at least not to the GTX version, and I wouldn't want to get the lower-end part this time around.
If R600, on the other hand, presents very similar, or exact same performance, overall, but with less power consumption on the high-end part, then I will be in such a dilemma, it's gonna physically hurt by brain.