"Kenan likes this" is something we all are way to familiar seeing, modern day social networks are evolving into something beyond being a way to communicate. It is becoming a substitute for communication. People nowadays are way to obsessed with social networks such as Facebook, have you ever seen people sitting next to each other looking down at their phones? This "thing" is changing the way people communicate. I make my assumptions based on these predictions, people nowadays are way to lazy to go out and socialize, people are obsessed with informing and knowing what other people are doing and finally to be able to contact anyone at anytime (as long as they are available at the computer).
I believe that in the following 1-5 years that the social network craze will increase, but there will still be people that stay away from it. This will further more increase the fact that people are frequently making status updates and "checking" in at places they visit. The little amount of people that are not using any social network will be ignored.
And 6-50 years later the whole world will be stuck in front of their computers/cellphones updating,checking in, chatting and sending virtual "pokes" to each other. The social aspect of human communication will be completely gone.
Cheers,
Stefan