That's what I was thinking. On the other hand, Microsoft has already ported some of the functionality to JavaScript to make Office 365 -- maybe they could offe

That's what I was thinking. On the other hand, Microsoft has already ported some of the functionality to JavaScript to make Office 365 -- maybe they could offer cross-platform support via an Office 365 client that could run offline? It would still be a far cry from Office on Linux/Android.