Out of nowhere, it seems Windows 8 has finally come of age, with a huge bump of 4.5% in the global desktop operating system market share. This gain seems to have come at the expense of Windows XP, which, following its official retirement in April, finally registered its first big loss of market share (6.7%). In case you were wondering, this means Windows 8/8.1 is now officially more successful than Vista, which is usually the yardstick for bad or failed Windows OSes.