Turner said that Microsoft's ecosystem, which builds Windows devices and mobile apps, is 18 to 24 months behind where he wants it to be, but it is "catching up."
Source: Microsoft COO Kevin Turner refuses to lose | Microsoft - CNET News
COO Kevin Turner finally let slip exactly what they mean by 'devices and services', and the desktop is apparently not included in that.
What he's going to find is not only will they not make inroads with tablet devices with that strategy, but they're more than likely going to cheese off the remaining developers on the PC side along with most of the users. About the only way it would work is if they overhauled mobile apps such that they worked in the same manner as applications, and I don't see them being bright enough to do that.
Literally, it would need to work like a secure application and not the Apple-style app they have now. Being able to background apps and have them continue processing, provide the ability to pass-in information through walled gardens from one app to another with permissions, being able to launch one app from another app, being able to access a shared set of data, etc.
Even with all that.. I wager that companies like Dassault Systems(maker of SolidWorks, pretty much the top product in CAD design and 3D printing) that are extremely heavy into Windows, would freeze their product development to a maximum of Windows 8.x. Nobody is going to put millions of dollars into hardcore applications so that they can then give Microsoft 20-30% of their revenue. Nor do they give a rat's behind if these products work on tablets or not.
They'll port to Mac and Linux and give Microsoft two of these ,,|,, ,,|,, first.