I think we've reached the stage where second order effects influence the discussion. So its not just a product which has to be killer, it has to be able to de

I think we've reached the stage where second order effects influence the discussion. So its not just a product which has to be killer, it has to be able to defeat facebooks increasing mass of capital. For that matter - lots of Facebook competitors HAVE been created. They've just been bought out by facebook or someone else. I suspect that eventually people will just die out of facebook, and at some point it will gain the moninker of gravebook. Once facebook stops being cool, it will stop gaining younger users and the network effect will end. Of course, people at FB have obviously considered this problem and have a plan for it. Perhaps they will live forever. Maybe we'll discover some first order effects of the network effect which limit its growth or even reverse its growth. Other than these 2 outcomes though, I don't think we have several degrees of freedom.