The things that make Docs and Sheets and such attractive aren't really the ability to create and edit documents -- we all have perfectly adequate versions of that on our laptops and desktops already -- so much as the availability of those documents on a shareable networked infrastructure. "Here's the URL to see my doc, here's the URL to edit the same copy in place" are the most powerful features.

If, say, Backblaze or Dropbox wanted to put a higher-value service on top of their storage infrastructure, I think that would be a good way to go.