With all the talk about Windows 8, it’s easy to forget that one of Microsoft’s most iconic operating systems, Windows XP, is still the company’s best selling OS. Or, more accurately was – Windows 7, also known as the OS that Vista should have been, has now officially overtaken XP in market share, according to web tracking company StatCounter. Windows 7 has managed to bag 41 percent of the marketshare, with XP sliding just below with 40 percent. MAC OS X is chugging along at 7 percent. It’ll be interesting to see how Windows 8 changes the dynamics of the current stats, seeing as some users aren’t happy about Microsoft’s implementation of the Metro UI.