And this is an argument for Windows RT, how?
I think you confuse things. I'm not against the Windows Store, WinRT (as in, Windows Runtime) or the concept of universal apps. Quite the opposite. As the Windows Store becomes more populated, the move might even make system architecture irrelevant. That isn't today though. And the success of this plan isn't dependent on the success on Windows RT. Windows RT (as a consumer tablet OS) could exit the market today and it wouldn't affect the overarching plan in the slightest.
It's not even that I don't like RT. I just don't see the point in it for a consumer tablet given Windows 8 has everything Windows RT has and more. If they can get RT running well on lower spec'd hardware then maybe it has a future in low cost computers for emerging markets or schools, or as part of the Internet of Things?
It very much would affect the plan. Where's the connection between atm phones and z86 tablets, win rt is very much needed for cross platform apps.
Especially as the next major update is rumoured to merge rt and wp into one phone/tablet OS.
And theological reason for RT to exit the market place?
Occams Razer, and that's how I see it, you're entitled to see it another way, but every ARM compiled Windows RT Video app not working with this specific codec but the X86 compiled one does?
It's not my opinion its fact. There are more built in codecs in x86