The best and excellent question!!
I have done a good deal of searching at both Nokia and Microsoft and can nothing on either site dealing with this issue directly.
I would note that the primary "news" on MS about anything related to this seems to be the ongoing development of Office 365 components so that they will have platform-independent files such as EXCEL, WORD, etc. products that will facilitate use across different platforms. For example, I can use my laptop to create EXCEL files that I can modify on my Android cellphone or iPad and store on my OneDrive account to access later on any of my devices.
As useful as this is, it is NOT anything to do with and should not be confused with a WINDOWS cellphone. If MS can follow this path and secure additional subscriptions to Office 365 applications (follow the money!!), it makes more sense to go in that direction than getting caught up in all the cat fights between different cell fans.