Bamelin,
Adam Sessler brought up a very good point about VR and how it can isolate people within the vicinity of the person where the headset. Imagine the scenario, you are play a VR game on your Morpheus, completely immersed in the world both visually and auditory, you fail to notice you girlfriend or wife step in the door. You don't say hi or acknowledge their presence, because you just immersed in the game. This social distancing is very dangerous.
Just like headphones that completely block out sound are dangerous on city street, VR can be dangerous in a social type of environment. If you want to appeal to the casual market, this is going to be a serious messaging, marketing and software development issue. Even "the hardcore gamer" care about this, whether they realize it immediately or not.
From a marketing standpoint, showing multiple people, together, using the headset is going to be critical. Then have software that can support that type of interaction (so the marketing isn't total fluff). Maybe even having software where the PS Camera recognizes there is another person in the room with you and notifies you in game (this would be a toggle-able option). If you show someone playing in their own personal room (dorm room, etc) that is a different type of social setting. But showing a TV in a common area with other people and then someone wearing a Morpheus is not going to work. Hopefully, I am explaining this sentiment well enough.