Windows already supports multiple architectures: x64,x86 and Itanium. It supports 4 if you count PowerPC (Xbox 360). Office now supports 2 different architectur

Windows already supports multiple architectures: x64,x86 and Itanium. It supports 4 if you count PowerPC (Xbox 360). Office now supports 2 different architectures x86 and x64 and used to support Alpha. I highly doubt that a company with $20 billion dollars in the bank would have a problem porting to ARM even if it didn't already have extensive experience on that platform (WinCE). MS could easily have their OS and Office ported over and released in the amount of time it would take ARM to make any serious dent in the x86 market. Heck, ARMH only has a 4 billion market cap, MS could easily buy the whole company in cash, at that point they'd certainly have the expertise. I'd say it's highly likely they could maintain a port. Realistically, ARM would probably pay MS and send over their top engineers if MS expressed interest in porting Win7 to ARM. NVidia would probably get in on the action too to avoid the x86 licensing problems they are facing against an AMD & Intel that aren't suing each other into oblivion anymore. At least until the next time they decide to sue each other into oblivion.