I like the idea of Windows on other hardware, especially cheap energy efficient hardware like ARM.
I don't understand why MS has both Windows Phone and Windows 8 RT, though. Both ARM-based touch-focused Windows OSs. But software won't run on both. Why? How many ecosystems can you realisitcally expect to create? MS obviously over-estimated their ability or their cache with users.
Creating ecosystems is hard. Even if you have the better product. And MS doesn't have the better product with either RT or Phone.
How was this supposed to work? Even if it sold, was it a "survival of the fittest" OS scenario? Kill RT if Phone did well? Or vice-versa? Eventually there could be just one, right?
Why not have one lightweight 'mobile/touch' OS that can run on ARM and x86; then have 'heavy' x86-only Windows for Surface Pro and Laptop/Desktops? Because it makes too much sense?
Perhaps RT was a play to get some leverage on Intel? Who knows. One thing that's clear is that the market has rejected it.