Think Windows 8 is a catastrophe? Well, tough - Microsoft is going to drag you kicking and screaming onto the new operating system. It's started with launching a new update for 3D graphics API, Direct X, that's only available for the new platform.
Microsoft revealed that it has no intentions of bringing Direct X 11.1 to Windows 7, meaning that gamers who want to take advantage of features such as stereoscopic 3D support will have to purchase a copy of Windows 8 (or its variants) for their computer.
According to Microsoft employee Daniel Moth on the Microsoft Answers forum
, "DirectX 11.1 is part of Windows 8, just like DirectX 11 was part of Windows 7. DirectX 11 was made available for Vista .... but at this point there is no plan for DirectX 11.1 to be made available on Windows 7."
See the full list of improvements included in Direct X 11.1 here