MS and mobile doc editing

In an interesting developing story (and a change of position), Microsoft comes to the top... at the iTunes store. It all makes sense if we think it over: Office remains the golden egg chicken for Microsoft and enabling users on new platforms is a way to keep MS Office relevant.
More on this topic:
http://www.cnet.com/news/microsoft-word-mobile-version-shoots-to-top-of-itunes-charts/