Matt Drance on iOS 7:

Now the hardware has caught up, and the Apple design team has a new leader. We don’t need the deception of “photorealism” anymore. Despite the loss of these tricks, iOS 7 feels more real. The parallax effect conveys an entire living world under that glass, not just abstract pictures and icons. This is reinforced by the launch and quit animations: your eye never loses sight of where you’re going, or where you came from.