GearVR and Rift owner here. Social VR, for example AltspaceVR, is also quite worthwhile with mobile VR like the GearVR. Yes, you cannot look around people and you have only one 'hand', but that's good enough. Another feature I regularly use is PhoneCast to use most Android 2D apps in VR. I remember catching up 4 seasons of The Walking Dead in double speed with BsPlayer every night. Of course BigScreen will also be a killer app when it's released for mobile to watch movies with others.