I guess from a legal perspective this hinges on the idea that you can't copyright/patent an API. The graphical design and UX, however, can be copyrighted I suppose.
I also wonder if it would be legally possible to do the same for iOS.
Also, on iOS, it would be an (¿almost? Does the iOS UI have any open source parts?) complete reimplementation of the user space.
I guess from a legal perspective this hinges on the idea that you can't copyright/patent an API. The graphical design and UX, however, can be copyrighted I suppose.
I also wonder if it would be legally possible to do the same for iOS.