All of the examples mentioned in the article (house party, indie concert, baseball game, Woodstock) are constrained by geography. The beauty of the internet is that it transcends geography, just like television does.<p>Take that concert with 90,000 people (the most people you can fit in a typical stadium). Put it on TV and you can reach 5 million households (like Barbara Streisand did in 1994 <a href="http://barbra-archives.com/tv/90s/concert_streisand.html" rel="nofollow">http://barbra-archives.com/tv/90s/concert_streisand.html</a>). Put it on Youtube and you can reach 5 million people a week if you're lucky.<p>The best part about the internet is scale. With 1 billion people using it, reaching just 1/10 of 1% is already a million people.