Nadella to merge all windows in just 1

Windows 8
Windows 8

That’s not a good promise so soon, But if it works could be the best achievement this guy can do for Microsoft.
But I would suggest that first He must finish just one good environment for Windows 8, nobody is using it in the best way and no one is liking it more than XP or Windows 7, not yet.
What if to a bad introduction of Windows 8 appears another bad introduction of a new Operating System for all devices?
Could not be a not good strategy to hurry up so soon, but its on your hands Nadella.