Sinofsky also said that the Windows-on-ARM machines will come with several Office apps — Word, PowerPoint, Excel and OneNote — that have been tuned to run in a very battery-efficient manner. But Sinofsky said that, although those applications will run in the traditional Windows desktop, they will be the only programs allowed to do so, other than components of Windows itself. [1]
I'm still trying to wrap my head around this one... why would they limit the OS, instead of saying that Metro was it, and have the Office15 team build out Metro versions of their applications?
Having the desktop/classic mode be only for built-in utilities and Office seems, at best, extremely short sighted.
[1] http://allthingsd.com/20120209/windows-on-arm-complete-with-...