iCloud doesn't really work like that
iCloud isn't competing with DropBox because it's not the same service. It's about sync - full device consistency in as many areas as possible.
That includes apps. The iOS app model, which can be frustrating, is nonetheless closer to the likes of Palm than it is to a standard desktop like OS - your documents are per-app, app managed and the filesystem is invisible. Palm OS did that via a database, iOS does it via the sandbox, but the user sees a similar experience. It's the same idea as syncing music and video via iTunes and libraries rather than manually via files and folders. With iCloud integration, things like Pages, Numbers and Keynote, or even the humble TextEdit, can save files directly into the cloud, to be read and even live-updated - but by those apps and only those apps, or their equivalent, including web apps - on other devices / in browsers, without needing to navigate around a filesystem to discover stuff.
How well this works for large amounts of data (large numbers of files) remains to be seen. It seems very home user orientated presently (nothing wrong with that, but a definite limitation in style).
Trouble is most people are familiar with manually managed files/folders, especially if from a Windows background, so they complain and want and old-school file-like interface for this stuff. Somewhat ironically, though, Windows has itself been moving more and more to the managed model via its Libraries features and people were clamouring for something Palm-like in the Longhorn days, because of the rumoured WinFS, which would be database-style and not based around a traditional "confusing" file hierarchy.
So basically, people are just rambling on about stuff because it's fun to complain and don't realise whether they've got what they asked for or what it was they were ever asking for in the first place :-P