It's a feature, but it's not necessarily a feature I can see any OS provider committing to providing properly. Because the really really really important part of Dropbox, for me, is that it's the same cloud storage syncing across <i>several</i> OSes.<p>Essentially, I am unconvinced that Apple/Microsoft/whoever wants to write a wonderfully transparent cross-platform experience which might, to an extent, subvert their own core platform.