We found a little information lately that outlines Microsoft's marketing plan to win over Windows 7 users and get them to upgrade. While Windows 8.1 Update 1 was supposed to do this, it didn't bring back a real Start menu (the Start button doesn't count when it takes you to the same useless interface), the rumor is that Update 2 won't bring that feature either. In fact, Windows 9 (aka "Threshold") will be bringing a single SKU that has different options baked in. If you install it on a tablet, it will behave much differently that on a desktop. This is a good idea, but if Windows users have to wait another year for a usable desktop OS, they may just move a different direction and away from Microsoft.
Users running Threshold on a desktop/laptop will get a SKU, or version, that puts the Windows Desktop (for running Win32/legacy apps) front and center. Two-in-one devices, like the Lenovo Yoga or Surface Pro, will support switching between the Metro-Style mode and the Windowed mode, based on whether or not keyboards are connected or disconnected.