For more perspective on this question, I'd recommend this recent video (~6 min) by Casey Neistat - https://www.youtube.com/watch?v=kKSr6h5-fCU
I feel there is clearly a trend line one could draw here in the evolution of social networking and social media. Since the initial era of social networking, friction was reduced (e.g. Instagram / Twitter) and now it's moving to be both frictionless and ephemeral (Snapchat).
It's interesting because the trend almost leads you something like life broadcasting (e.g. Justin.tv) - but we've already been there. I wonder what the next phase will be.