Windows Blue: Microsoft’s plan to release a new version of Windows every year
Way back in August, three months before the release of Windows 8, we learnt about the existence of a project at Microsoft codenamed Blue. At the time it wasn’t clear whether this was Windows 9, or some kind of interim update/service pack for Windows 8. Now, if unnamed sources are to be believed, Windows Blue is both of those things: a major update to Windows 8, and also the beginning of a major shift that will result in a major release of Windows every 12 months — just like Apple’s OS X.
http://www.theverge.com/2012/11/28/3693368/windows-blue-update-low-cost
http://www.zdnet.com/windows-next-just-call-it-blue-7000002535/
Windows Next: Just call it 'Blue'?
Summary: Windows 9 might not be Microsoft's next version of Windows. Instead, 'Blue' could be the interim release that shows up first.