Gabe Newell: DirectX 10 for Vista was a mistake quotes Valve's Gabe Newell decrying Microsoft's decision to make DirectX 10 exclusive to Windows Vista as a mistake that's harming the PC gaming industry (thanks Slashdot):

In an interview with heise online, Gabe Newell, president of Valve Software, said that Microsoft made a terrible mistake releasing DirectX 10 for Vista only and excluding Windows XP. He said this decision affected the whole industry as so far only a very small percentage of players can use DirectX 10.

When developing cross-platform games which are also released fo Xbox 360 and Playstation 3, developers look for the smallest common denominator. And since neither Microsoft's nor Sony's new consoles support Shader Model 4.0 for DirectX 10, only few games use it, he said.

In addition, Newell bemoaned the increasing lack of input device diversity in PC gaming culture. He would like to see controllers like the Wiimote or the Guitar Hero guitar, but since DirectX support for devices like these had increasingly been reduced over the last few years, developers didn't dare implement these expensive innovations.