"PrivOS’ main innovation is its Security Center, an interface that allows the user to explicitly control just what bits of hardware functionality and data each application on the phone has access to"
Those of us with a normal but rooted Android can do these things already with XPrivacy, an XPosed module. Fine grained control per system call, also for system apps (yes, that includes keeping pre-installed Facebook out of my address book and gps data). And I can choose to simply refuse, or tell it the address book is empty and I'm on the south pole.