We've already had "My Documents" "My music" "My videos" "My pr0n" and similar such default directories in new OS installs for some time. Just kidding about the fourth one?
I would imagine you'd have under Person "25cf" an option for dropbox, ebook, etc. In fact for shared stuff this could be kind of cool, click on my wife and here's our shared dropbox folder (well actually we're more a google drive family, but whatever, I assume dropbox supports semi-private sharing of folders between users, etc). Or click on my wife and then her ebook collection to toss her a copy of a free (libre) ebook.