S!
There are titles that bring ANY card to it's knees even today and they sell, so arguing that SoW would not sell even it would require a nuclear powerplant to run full details is a bit vague. Every game has this setting that will strain the system to the maximum. SoW will run on DirectX 9 and DirectX 11..so there you go. Hardware is backwards compatible thus you can reduce settings and the game still looks good.
You could not play IL2 on all maxed out with more FPS back then..how could you if even today's hardware has to struggle in certain scenarios
What I've seen floating around is that Fermi is a bit faster than 5870 but not faster than 5970. Again, benchmarks can be fabricated by any brand so I rather see myself how it performs in ACTUAL gaming. Sure will be a good card nevertheless, but still pricey. nVidia has always been more expensive than ATI and what would change that? They have dumped a crapload of money in this card and need returns..and they know hi tech junkies buy the card no matter what price they slap on it
So I dare to bet that we need a very high end computer to really make SoW run with everything maxed out..and it won't hurt the sales of it. People just shell out more moolah to get better hardware..so has happened over the years already and nothing changes in that department