If anything, the goal of an ARM port of Windows is to avoid being blindsided by Linux (and maybe MacOS) creating a beachhead among mainstream users on cheap netbook/nettop ARM hardware (an ARM netbook running Linux would be noticeably cheaper than a Windows touting Atom). Remember how Linux netbooks were popular and then Microsoft kicked, screamed, dropped license prices and essentially bribed netbook manufacturers to promote Windows on netbooks (remember ASUS recommends Windows7 on eeePC) ?