Facebook is on its way out anyway... just like Myspace was a few years back.
Next?
Next phenomenon after Facebook/Twitter/Instagrams/hashtags and hash in general will be the Phenomenon known as CSWOLIOSIS.Extremely Blurry images, rap-lyrics, Cupcakes for all etc.
Examples:
No Wrappings for your Lollipops
UK Jeffrey where you at SON?!?!?
These so called Sites or CSWOLITES will be integrated in everyones Television-set in 4 years.