WWDC isn't a "spectator's" show, it's for developers to create their apps on the upcoming platform or hardware so they can make money, it's all business.
It is and it isn't. WWDC is exactly the same as a fashion show. That was my point. It's not only devs - journalists, tech bloggers and rich geeks go too. Couldn't be more similar in the same way fashion journalists, bloggers and celebrities go to fashion shows as well as designers - it's only celebrities that get singled out because they're the only ones the public recognise.