DirectX 10 characteristics improved 3-D graphics-rendering capabilities greatly. Furthermore, it can also promote the performance of your computers in games and high-end 3-D application programs. By applying this, games can appear with new visual effects and can deliver more visual detail within one frame.
Directx 10, which is designed around in the new driver model in Windows Vista, has great functions on rendering capabilities and flexibility, including Shader Model 4.
Directx 10.1, an upgrade version of Directx 10.0, is accompanied with and requires, Windows Vista Service Pack 1. For the graphics vendors, this release is mainly to build more image quality standards. As for the developers, this may give them more control on image quality.