One of the big problems with Windows Vista was the fact that Microsoft's next-gen 3D graphics API DirectX10 was exclusive to the OS. That was likely the big reason why game developers were reluctant to offer a lot of DirectX10-supported games since the audience for such games would be limited. The release of Windows 7 last week brought out a new version of the API, DirectX11, but Microsoft promised that it would make an apperance on Vista.That time has apparently come as a new automatic update for Vista has now implemented DirectX11 support for the nearly three year old OS. With two versions of Windows now supporting DirectX11 we expect game developers will embrace using the API in their games than they did with DirectX10.
[Via Blue's News]



They should also support Windows XP, which is still the most used OS. I don't think there's any technical limitation preventing porting DX11 to WinXP, other than wanting users to upgrade to Vista / Win7.Posted at 11:00PM on Oct 28th 2009 by OMA