The more or less reality is that GTX470 is less powerful than a HD5870, the first will cost more, consume more.
GTX480 will be just 5-10% faster than HD5870, it will cost way more, near HD5970 price if not even more. Eats a lot of watts(275w), near HD5970 consumption (290w).
HD5970 is like 60-70% faster than HD5870.
HD58** released six months ago.
That's your broken and unfixable fermi. And lets not forget that real deal is the HD5850 with it great OC'ng skills and two paired in CF.
Hope Ati lowers prices, that's the only thing that matters, Fermi will be a fiasco, mark my words.