Redesign, schmedesign. Apple's designmeister Jony Ive can harp all he wants about harmonious grids, elegant typography and the holy essence of genius contained in Dieter Ram's underpants. But the fact is that the most oooh!-aaah! feature in his new iOS 7 is the parallax effect you can see in this animated GIF. It's like magic distilled from squeezed rainbow unicorn ponies sandwiched between glass and metal.
I know it's not as useful as the other features introduced in iOS 7 today. But it is useful: it allows to make a distinction between different layers of information, giving a sense of space that will help the user understa—ok, it's just awesome and I can't wait to use it.