Year it was supposed to blow: 2009
What happened: Remember Chatroulette? The video social network that devolved into dong-filled peep show? Yeah, that didn’t bode too well for the future of video-based social networks. Other companies have come along in an attempt to pick up where Chatroulette founder Andrey Ternovsky left off. Sean Parker and Sean Fanning, for example, teamed backup to launch Airtime, a service where people can post videos and respond in real time. The verdict is still out on how that will pan out.