I acknowledge that that's not necessarily an entirely worthy goal in and of itself, but keeping a design focused product fresh does have its merits.
Here's iOS 1 and 5 side by side
http://pocketnow.com/wp-content/uploads/2012/06/ios1ios5.png
Other than the obvious lack of a wallpaper I'm not really sure that there's been any fundamental work on improving the user interaction and look & feel of the thing in 5 years.
I find it unbelievable that there's nothing that could be done better and that iOS was launched with perfect interaction design, fully formed from the heads of the designers, or perfect visual design, reverently propagated to the modern day and on into the future.
Is this really the penultimate in volume slider design? There's no more work to be done here?
http://www.uiparade.com/wp-content/uploads/2011/12/clean-ios...
I think this recent shakeup is Apple signaling that it's time to evolve again and that excites me much more than the last 2 or 3 product launches have.
If anybody can put out a new way of pushing electrons around and making it "just work" it's going to be Apple and I want to see what they come up with.