MS Office - who needs a native copy?

According to The Register, Microsofts oft-forthcoming online version of office will have operational components that allow iPhone users to "view and scroll through" office web applications. It is not entirely clear if this actually means documents, or if the Redmond based company is allowing the application to actually run on the iPhone.

The bit that caught my eye, though, was that they demonstrated a variety of platforms -including mobile devices - editting the same documents, where the results of the edits appear the same on each of the devices (presumably after synchronisation).

Does this mean that - at long last - full office applications are going to become available on ARM based devices via some clever integration of cloud apps into the WinCE/WinMo browsers and OS?

All of this would be the logical step for microsoft to address all of the criticism levvied against them regarding their limited support for ARM based devices with their OS. If all of their future software becomes available through the cloud, then that gives fair-game access to most of their apps via many different processor architectures, and even from within other OSes such as Linux.