According to NetMarketShare.com, Windows 8 market share continues to grow with over 8% of the market at this point. Of course, Windows 7 also continues to grow as well. The big loser is clearly Windows XP.
For Apple fans, it is worth noting that no matter how much you might rant about Windows 8, it already has twice the market share as OS X 10.8!
Here is a chart from NetMarketShare showing this year's trends. And yes, Windows 7 did grow more last month than Windows 8!