Do you remember Second Life? It was a virtual reality world launched in 2003 where people could meet online and lead a second life as the name implies. It was once the coolest thing since sliced awesome, up there with Twitter nowadays. Second Life got blanket coverage in the press and it was going to revolutionize the way we used the Internet.
What was Second Life all about?
On the platform, you signed up and picked an avatar for yourself such as a knight or princess, very much in the spirit of Dungeons & Dragons. In your second life you played out your alter ego, and you did it alongside other real people's alter egos.
I never actually used it myself but I certainly read enough newspaper articles about it. Second Life was tipped to become the Internet 2.0, with everyone signing up and interacting on it. By 2007 the site had four million users which was an impressive figure back then but dwarfed by most large social networks of today.