Hang on, we were promised this crap just before Windows 8 was out. I don't know how consumers felt, but from a developer point of view it turned out to be vapour.
Platform specific stuff pretty much irrelevant to us, as we've moved onto making browser based apps - That is one API for almost every platform (covering MS, Google, Apple, Linux). It's BYOD for my apps!
We're no longer restricting ourselves to single platforms, especially unproven, always changing, and desperate ones like "the new Windows" is becoming.
I used to be a desktop developer, that cow has been well and truly milked (and rogered a bit).