Ok. The problem I see is how many 'social networking sites' can you be on before you're not 'connecting' anymore and they are the very things keeping you from having a physical social life? It's almost an oxymoron.
I abandon hope. We'll all turn into couch manatees with the only dense bones left in our bodies belonging to our fingers. Maybe the arms will morph into our torsos too. (Oh that's only for the ones who sit like me, slumped, belly distended)