The latest market share data from Net Applications shows that May 2013 was a decent one for Windows 8, which gained 0.43 percentage points (from 3.84 percent to 4.27 percent). Windows Vista meanwhile lost another 0.24 percentage points (from 4.75 percent to 4.51 percent), after finally falling below the 5 percent mark in March.
If Windows Vista merely held steady in June, Windows 8′s growth would allow it to pass its now ancient predecessor. However, assuming that Windows 8 grows as it did in the past month, and Vista declines in the same fashion as well, and we should see the month end with 8 controlling 4.7 percent of the market, and Vista 4.27 percent.
Put another way, around the middle of June, Windows 8 will surpass Windows Vista as the third most popular operating system variant in the world. It’s taken longer than expected, given soft sales of Windows 8 and a slowing PC market, but now around 7 months into its life, the new version of Windows is about to claim its first victim.