Gerd Leonhard is a futurist in the Media, Technology and Communication Industries. On the video below, he talks about social media and how he thinks it will change the way we live, communicate and make money in the near future. He also talks about the probable consequences of these changes on privacy, advertising, intellectual property and business paradigms.
It is very interesting.
PS: you can skip the first 60 seconds of the video. The introduction is not worth watching.