Windows 8 is reputed to be ARMed.
The only public event featuring Windows 8 so far was the Build conference in September, and all demo ARM devices were kept under glass with a strict no touch policy. The fact is that no one who isn't bound under NDA has actually touched an ARM powered Windows 8 device.
"They that can give up essential liberty to obtain a little temporary saftey deserve neither liberty not saftey." -- Benjamin Franklin, 1759