But here’s the real key: there will also be native syncing software that you install on your various computers and mobile devices. Yes, like Dropbox.
This was also true back in the day with GDrive, but again, the service (codenamed: Platypus) was said to be very buggy. Now it is said to work well. If you have a document on your computer that you want to move to another one, you simply drag and drop it into this new Google Drive sync app. Or, of course, you can use the web.
I use both Dropbox and Google Docs. It will be interesting to see if Google Docs will convert Office docs to work with Google Docs if they are update through the desktop instead of the web. If the files transfer/sync works like Dropbox and doesn’t convert the files, I might be switching my cloud storage systems.