Not true - one fundamental thing iCloud does that none of the synced-file services can do is seamless conflict resolution and offering devs an interface to do t

Not true - one fundamental thing iCloud does that none of the synced-file services can do is seamless conflict resolution and offering devs an interface to do the same. If I create 10 Widgets in an app on my iPhone, and go to my iPad and create 10 more widgets, I expect that all 20 widgets be visible on both devices reasonably quickly. On Dropbox this is still a highly manual process, on iCloud this is handled behind the scenes and app devs have access to a (relatively sane, if still currently buggy) interface to make this possible. This is a huge use case, and part of why cloud sync is rarely as simple as downloading/uploading a file to a central source.