I'd be very interested in just how much social plays into the mobile experience. For example, although Facebook is one of my most frequented apps, I also to check news, play casual games, view website statistics, manage email, listen to music, check my finances, track my weight, calculate tips, read ebooks, watch Youtube and Netflix, and manage to-dos.

Is it entirely certain that designing the operating system among sharing photos and posting status message updates will be optimal across all mobile functions? Not sure that it's the case.