So this just happened.
http://blogs.office.com/2014/11/04/office-dropbox-work-together-phones-tablets-web/
https://blog.dropbox.com/2014/11/dropbox-microsoft-office-partnership/
So what’s this mean?
Basically that you’ll be able to edit documents through Office Web Applications and Mobile Apps directly connected to DropBox.
So if you’re already using DropBox for all of your document storage for your personal stuff, and you’re using OneDrive for Business for all of your work stuff, no longer will you be forced to actually synchronize everything to your local storage if you can reach out to the web to use it.
Very cool stuff. Excited to see it in action.