I'll give you maybe Excel, but for a standard document (and really most spreadsheets, which for me admittedly aren't very complicated and the real-time sharing is more important) Google Drive kills Microsoft's offerings to me.

Especially mail. Gmail and its web interface are far superior to Outlook in usability, far less frustrating experience to me.

Basically I disagree that 'native' apps will always be superior here. Docs and Gmail are already superior on the web IMO.