A new job vacancy posting on the Microsoft Careers site talks specifically about “Windows Blue”. First of all, It is not a whole new version of Windows like a Windows 9. According to that posting, the Core Experience team in Windows Sustained Engineering (WinSE) is involved in making improvements to the start screen, application life cycle windowing and personalization. Windows Blue will build on and improve OS components. Windows Blue is expected to appear mid-2013, will roll out across Windows and Windows Phone to give customers more regular updates across its entire ecosystem.