I am not so sure all core gamer's feel the same. Especially those core gamers who have been indoctrinated early in social media. BK, I am assuming that you are of the elder age group here in the forums. If you are, their is a different perspective to social networking and gaming with the younger generation of gamer. We are seeing a paradigm shift, in how we interact with games and other gamer's online.
I still doubt even today's teen and young adult gamers care abour sharing stuff on facebook when they are playing games.
I mean, raise your hands if you do, but I think the vast majority of gamers do not consider it a selling point, at least not nearly to the point the article implies.
According to recent studies most young kids and young adults are getting tired of facebook and looking towards twitter. But even then i doubt someone would put them self in a position to be the laughing stock in their circles if they actually shared something on facebook.
Or at least i would think they do, i have and will never use facebook.
Also as previous consoles the thing that decides where someone ends up if they are in doubt, has proven to be what your friends have, so if thats a ps4 well then you are more likely to buy that.