I do enjoy the speculation and banter but what does it really matter. If it's faster than the 7970 then the green team fans have an upgrade option, one the red team already got.
I just picked up two 7950's for eyefinity and one of them's handling most games quite handily on 3 1920 x 1080 monitors with just the factory overclock.
We're getting to the point that unless high res monitors become the norm there's not going to be much need for more.
That said, devils advocate, maybe I'll be in line for some new ones in a couple years but only if there's a need for that much power.