DirectX 11 is the next generation of graphics technology, arrives with Windows 7. This is great news for players as many of the newest Windows games will take full advantage of this technology to create more immersive and detailed worlds and experiences. Game developers will utilize new features to create rich worlds, realistic characters, and more fluid gameplay.
Tessellation – Tessellation is implemented on the GPU to calculate a smoother curved surface resulting in more graphically detailed images, including more lifelike characters in the gaming worlds that you explore.
Multi-Threading – The ability to scale across multi-core CPUs will enable developers to take greater advantage of the power within multi-core CPUs. This results in faster framerates for games, while still supporting the increased visual detailing.
DirectCompute – Developers can utilize the power of discrete graphics cards to accelerate both gaming and non-gaming applications. This improves graphics, while also enabling players to accelerate everyday tasks, like video editing, on their Windows 7 PC.
These who already own DirectX 11 hardware (like the ATI Radeon HD 5000 series) aren't required to wait for Windows 7. It is now possible to install and utilize DirectX 11 even on Windows Vista. All you have to do is to download and execute the attached script below. This script allows you to install the Platform Update for Windows Vista (KB971644) from Windows Update - which includes DirectX 11. Read more at NGOHQ.