I still maintain that's a flawed estimate. If people use their PC mainly for gaming, XP does the job just fine, there's no reason to switch to a modern OS if gaming is all you do. Similarly with graphics cards, there are still little enough proper DX11 games to justify the purchase of a modern card when years old cards still have more than enough power to play most games very well. I think we can expect to see those numbers skyrocket when more DX11 capable games start coming out.
Yeah, I agree that the Steam survey isn't perfect. There are other questions I wish they'd ask (and other ways I wish they'd report the results), and I'm also sure that their user population includes a decent number of people who just do the "casual"/indie games on weak systems. But it's hard to find any other major surveys or polls on the topic. :sadvaultboy:
Exactly. Tesselation is the biggest must-have feature. So if that's not in, why would they bother with dx11 at all?
Well, if they're planning to use this new engine for more games (good bet), then spending the time to fit in DX11 now means they don't have to in the future. Also, we can see if modders can make it do anything. Plus, as mentioned, new efficiencies.
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Personally, I like the way the current console gen has held down the minimum requirements for cross-platform PC games. It's meant that I've actually been able to play some of the games in the last couple years.
(It's getting harder, though.... many of the upcoming games this year that look interesting have much higher PC reqs..... Dungeon Siege 3, for instance. Sigh.)