Hasn't this been done before?
"How to run normal x86 Windows apps on your Windows RT"
"How to Jailbreak Your Windows RT"
As far as I know, Windows RT was the ARM version of Windows 8. Unfortunately and obviously, only some exe (probably simple application) can run. http://forum.xda-developers.com/showthread.php?t=2092348
On the side, Microsoft should probably have done this themselves like before 2012 with their 'Mobile First' motto.