Microsoft appears to be preparing to add some significant changes to the next version of Windows. According to the big God Paul Thurrott, Microsoft plans to allow the Start menu to return to the next major Windows Update, with its current research code "Threshold". The Start button has been formally returned in Windows 8.1, and the Start menu will be followed closely. It is not clear whether every version of Windows threshold is added to this Start menu, and Thurrott guesses it or makes it an option for users to choose from, and only supports desktop applications.
More changes to the threshold update also seem to include allowing Windows 8 style applications ("Mtero") to run in desktop mode. Current Windows 8 applications can also run in parallel with desktop mode, but it is said that the next version of Windows will extend this feature to allow Metro applications to hover in a single window to appear on desktop mode. Of course, third-party apps like Stardock's modernmix have long supported this feature, but Microsoft seems intent on supporting it natively, giving users more flexibility in using new apps.
Prepare separate windows for ordinary consumers and enterprise users
Zndet also reported on Threshold's reports that Microsoft is preparing a streamlined windows for ordinary consumers, including a version focused on Windows 8 applications that will be updated frequently and used on ARM based Windows tablets, As well as PC and Windows Phone. There is also a more traditional version of the consumer, designed specifically for the current PC market, and fully supports existing desktop applications. A separate enterprise version will include policy management and the various enterprise features you expect, but it will not be updated as frequently as the SKUs prepared for ordinary consumers.
Microsoft is expected to launch the Windows "Threshold" version in 2015.