[kingsidharth]

If iCloud did exactly what Dropbox does, that would be a copy, no?

iCloud syncs, in principle, and makes things available on all your i-devices.

Dropbox syncs, in principle, and makes things available on your devices.

[k-mcgrady]

You just invalidated your own point. If iCloud was 'stolen' from Dropbox it would take what Dropbox does and vastly improve and build upon that based on your login. But you have just said above that iCloud 'sync and make things available on all your devices' and that Dropbox' syncs and makes things available on all your devices'.

[bergie]

You're thinking improvement in terms of end-user features, while Apple thinks of it in terms of ease-of-use and ecosystem lock-in