I think it'll take Apple a bit to figure out their exact niche. Remember the original release of OSX 10.0? It was a hodge-podge of pinstripes, liquicap buttons and realistic looking icons mixed with some old 4-16 color icons. It was a mess if you're judging by where they were by the time OSX Tiger (10.4) was released. I'm sure the same will happen for iOS.
Just going to point out here that iOS is already a 6+ year old operating system. Tiger came out 4 years after OSX's debut. iOS hasn't found it's niche yet?