Just a thought. A friend of mine has had 2 jealous and insecure partners in the past who have taken their iPhone and used their fingerprint on touch ID to unlock the phone whilst they slept... This is abhorrent behaviour to be honest... However, if the rumoured FaceID unlocking is coming on the next iPhone, wouldnt it be even easier for someone to pick up your phone and unlock it just by pointing it at your face? Obviously the phone wont know whether its you holding it... So it seems a step backwards in security to me!