When Apple announced iOS 6 many people were underwhelmed because it didn't really include much at all. Android's upgrade from 4.0 to 4.1 included bigger updates than Apple's jump to a whole new version.
Joost van der Ree has come up with what is undoubtedly one of the best iOS concepts to date. He's taken some ideas he's come up with and roughly implemented them, making an animation video showing how they would work.
It is actually very well done and the ideas he has come up with could be implemented to make iOS a better mobile OS, because it definitely is not the best mobile OS as Apple like to think.