Tom's Hardware has another huge Summer 2007 VGA charts:
There has been a lot of activity since our last VGA charts were published, primarily in the form of a new operating system and DX10 compliant graphics hardware. Gaming preferences and purchasing decisions are still driving the market forward, but the market is moving slower than expected by many analysts. While Vista installations are continuing to rise, the majority of operating systems remains fixed on Windows XP. According to the latest Steam install survey of gamers logged into Steam who have allowed their systems to participate, over 90 percent are still running XP. Also noticeable in the survey results is the fact that while DX10 hardware may have all of the sexy hardware components, less than 2 percent of the install base has a DX10 capable card, while 6 percent of the systems are running Microsoft Vista.