I don't think that's a very valid comparison. Because if you use the iPhone OS it doesn't feel any more babyish than any modern OS, desktop or phone. Just intuitively designed at the things most users need to do. The real problem is the arbitary restictions on the user. The unix core, background apps, install apps from any source. Seriously they just need an expert mode toggle.
Remember the days when AOL was referred to "The internet on training wheels"? AOL controlled every aspect of how their customers were able to interact with the internet.... just to make things easier and more convenient for them.
I am beginning to get the impression that Apple is trying to do the same thing, by trying to "control' all aspects of how their devices connect and interact with the internet.
AOL's thinking was they were just making things easier for their customers by doing this.... where is AOL's customer base now?
Maybe Apple should think about that for a while before they dumb down how their devices can interact with the internet.......