If/when apple exposes an "iCloud folder", then it'll be competing directly with Dropbox. It's currently not a competitor, just a potential one. Although it'll be a Mac-iOS only solution anyway, not catering to a huge portion of the "real world" - linux & win users.
Yeah, that's true. For me, without cross-platform support (and a website) I still wouldn't be able to use it: my Dropbox syncs with 2 Ubuntu machines, 2 Macs and a Windows laptop, and I simultaneously use it to access files on my university's lab (Windows) computers via the website.
