The difference in skeuomorphism between OSX and iOS
It appears Apple is maintaining a fashion of skeuomorphism on the Mac side. I found Garageband (and the new Logic) to be amazingly beautiful. I love the realism of the drawbar organ, the instrument selection panel - it delights the senses and makes your creativity flow.
On iOS we didn't get to see much garageband thus far during the keynote. It will be interesting to see the mix they achieve between the "radically redesigned" iOS and the instruments (which I presume are still skeuomorphic).
I posit that Jony likes certain, reduced skeuomorphism, like the notes, or reminders app on iOS7. You don't gain anything by reducing these apps to a blank white screen with a cursor.