Mobile phones and VR are different non competing markets. AR might eventually compete with phones once you can wear an AR device all day everywhere you go. AR and VR should be treated as distinct; a good VR headset is bad for most AR usecases and vice versa. Maybe at some distant time there will be hardware capable of doing both really well but not for many years. VR fits into daily life as a social experience and will be obvious once eye, face and full body tracking are included with the headset. Even before that if someone solves the network problems with concurrent users and delivers an experience that handles audio well enough to work with multiple people having conversations within earshot of each other. AR is really just putting screens and overlays everywhere, conversational interfaces will have more and better impact than that.