I love the optimism. Really. However, while IRC is a great collaboration tool, and one I also grew up using, I find that though users are anonymous and no one can see each other, there are still plenty of trolls who have many ways of getting under one's skin. This utopia of IRC simply doesn't exist. It is still comprised of humans. Anonymous humans. And anonymity tends to bring out the worst in people.
What I'm afraid of are the centralized proprietary chat networks and the perverse incentives that creates for censorship. Censorship is the worst in people. Anonymity just means people aren't constantly playing identity and power social games.