The easy way to define iOS 7 is to compare its design to both modern Android and Windows Phone 8. To claim that iOS 7 is just a “flat” interface is missing one of the key points of the new platform.
iOS 7 may not be rich with textures, but it’s not flat. It’s layered. This completely layered experience that is going to change the way we interact with apps over the next few years.
This is a damn good rebut of the “iOS 7 is just a flatter iOS 6” line espoused by reviewers and a few app developers alike.