Um, the transition of WP8 was to the NT kernel from CE smart guy.
Read the Thurrott article, its about culture/brand, not tech, which is MS's greater issue and why their decisions have the potential to make Win8 such a make or break risk for them long term. It doesn't threaten the consumer darlings in iOS/Android but it does make business nervous because MS doesn't even have a strategy yet. The identity crisis of Win8 is MS saying we don't know what the future holds.
"The people who can’t stand Windows 8 are the same that used to gravitate to NT, power users, IT pros, and developers, and they would have happy-ecstatic, really—to give up the Fisher Price silliness of Metro for a desktop-only version of Windows 8 that is actually optimized for the hardware they really use...Something that’s necessary to remind customers that Microsoft hasn’t forgotten about the doers in its mad rush to satisfy the fat content consumers who only care about playing Wordament and checking Facebook with their fingers. This silliness needs to stop. And NT is the answer."
Strange, contrary to Thurrott's claims, I'm quite productive with Metro apps. It seems he's doing what half the people here did. Wrote it off before trying it or letting it time to evolve and mature. Eitherway, if NT didn't go away, (which you're right, for some reason I pictured the Windows NT OS), then he should have nothing to worry about. If anything's become clear recently, it's Microsoft wants to expand into other markets and new input technologies.