Re: Cart before the horse
Microsoft should have required Intel mobile chips in their Continuum phones.
The whole thing started with the WinRT fiasco. They could, and possibly should, have included something like Rosetta, possibly backed with something like Transmeta's emulation microcode on the hardware, maybe throw in some ART style JIT cache; depends a bit on which resources are available. But they were worried about cannibalising their existing market and pissing off Intel.
For the last few years all mobile chips have been beefy enough for this kind of thing which Intel demonstrated with the ARM emulation code for x86 for the Atoms: nearly all apps ran fine at the cost of battery use.
My guess is that they're getting ready for the long-heralded but Zarquonesque arrival of ARM on servers and possibly desktops. Many of us expected that to be from Apple this year but they were too busy raising margins and adding fluff. Still, can't be too long before we see some impressive reference designs.