Comment Re:Statistics, statistics (Score 3, Interesting) 401
The latest stats that I read (which was for June) was that in terms of marketshare, Vista is at around 14.5% (down from almost 20% when Win7 was released) and right now Win7 is at around 13.5%. So if you factor in the percentage of 64-bit systems all combined, it puts 64-bit Windows platforms at roughly 8.25% give or take. These are all rough numbers, and there's varying estimates out there (some higher, some lower in terms of overall marketshare) but I think it's safe to say that 64-bit Windows systems are around 10% overall.
Windows XP usage has dropped as well since Win7 was released (by about 7%, it's now at about 62% of systems overall). So for the most part, Win7 has cannibalized both Vista and XP installations fairly equally, but the effect has been much more profound for Vista because there were far fewer systems out there running it. I would exepct that by the end of the year, Win7 will clearly surpass Vista. Long term, I'm looking for when XP drops below 50% marketshare; when that happens, I think that'll be the indicator that the transition is accelerating.