Some interesting points here about induction charging and springboard, among other things. Don't know if apple will borrow some of the watch interactions for larger devices, but some of the stuff in the watch sure makes sense on a phone.
http://www.cliffs.reviews/2014/09/on-watch-and-user-interfaces.html
http://www.cliffs.reviews/2014/09/on-watch-and-user-interfaces.html