Next up is a redesign of the Mac OS. I can almost guarantee that OS X Mavericks is the last Mac OS to stick with the OS X look. The change is surely going to be as drastic, if not more so, than the switch from iOS 6 to iOS 7. This leads me to also believe that the next Max OS will not be called OS X, but will instead have a new name. I don't have any speculation on what that name could be.
It will still be OS X according to what they said at the keynote. But it indeed might be the last one with the current look. I wasn't aware that Ive is in charge of the entire UI stuff including Macs. This would mean that after he is done with (imo) ruining iOS, he will start to disimprove OS X.
Ive is the man behind selling 9 million iphones in a weekend.
Now, Who are you?
It's still Steve building the spirit, Tim running the business and thousands of people developing, engineering, marketing and managing the supply chain etc who are selling it. Ive is the man behind the it's-so-ugly and how-to-go-back-to-ios6 postings in the Apple discussions. People upgrade because it's new and it's from Apple (and they can't go back), but not because it's so pretty.
Regarding Tim and what he has accomplished, I think that he is doing a pretty good job. He might not have the obsessive passion and vision for design what Steve had, but Apple is still up and running as we know it, and that requires some serious management and leadership skills.