iOS 7 represents a very big shift in the way your next iPhone or iPad will look and feel compared to the previous six incarnations of Apple's software. Taken as a whole, its easy to see the change that the platform has made, but it isn't always easy to see the smaller changes that came to each icon. Luckily, there is a GIF to show you how iOS 6 morphed into iOS 7...
Source: http://www.phonearena.com/news/Interesting-GIF-shows-iOS-6-morphing-into-iOS-7_id47462
Source: http://www.phonearena.com/news/Interesting-GIF-shows-iOS-6-morphing-into-iOS-7_id47462