No… it is not Apple’s Mac OS X.
No… it is not open source Linux.
It is… Windows XP!
That’s according to the research firm Gartner.
Gartnet predicts that during 2007, Windows Vista, despite the fact that they are being shipped with most new PCs, they will be only installed on 12.3% of homes worldwide, while XP will hold a 77.1% share.
By the end of 2009, Vista are expected to surpass Windows XP, and achieve a 55.4% market share. At that time, XP share will fall down to 40%.