iOS 7

Rene Ritchie:

When a company like Apple goes to all the trouble of building a physics and particle engine to support their interface, when they objectify it and gamify it and make it a dynamic, living thing, it opens up a lot of potential. When you add Text Kit to mix, and the design language in general, and when you see what it all looks and feels like on an iPad mini, then the possibilities for a bigger iPhone next year become infinitely more exciting.

Good recap of the real changes brought by iOS 7.

(emphasis mine)