As a longtime internet publisher, I am rarely amazed by technology or even shifts on human culture since most are buildups over decades and you can see them coming. I have studied the Industrial age and understood the massive impact it had on agriculture, manufacturing, mining, and transport this age had a profound effect on the socioeconomic and cultural conditions in Great Britain which changed the world.
Social Media is in this same role with and amazing component of "People that are enabled" and have the ability to make this change occur faster than we may have ever thought. Social media has the power and passion to change just about everything we can imagine. The collective of the human brain is a powerful thing. Only the strength of the human heart out weighs it and that is the beauty of social media, the mind and soul are both at work.
If we think things are changing now, wait about 2-3 years. . . the face of our planet could be very different.