Erris writes "Valve's President Gabe Newell is calling Microsoft's choice to make DirectX 10 Vista-only a 'terrible mistake' that has harmed gaming. His company's latest hardware study shows the strategy has not moved gamers onto Vista. The result is that almost no one is using the newest version of DirectX, and companies are shying away from creating new input devices that support it. Nine months after release, after Christmas, after graduation, and with school mostly back in session, still only 8% of gamers are using it." Update: 08/27 21:09 GMT by Z : An AC points out that these numbers may be framed poorly given uptake numbers for XP's release.