Re: Windows RT 2?
"...Anyone remember how Microsoft screwed their users last time by abandoning Windows 8 on ARM?..."
WinRT - Yes. Let's produce a device that can't run any Windows application because we can't be bothered to put a virtualisation layer in.
WinPho - Yes. Let's produce what could turn out to be an actually decent phone OS then screw all of early adopters by bringing out the next version and making it so that they can't upgrade to it unless they buy a new phone.
Buying any non-Windows compute device from MS other than an xbox seems to be a dodgy proposition.