[lwkl]

Their audience are no longer the people in the room. The audience is the people watching the video or livestream which is great because that means you don't need thousands of dollars and an invite to go to WWDC.

[microtonal]

When the keynotes still had audiences there was also a livestream. Here, have a WWDC 2007 for kicks:

https://www.youtube.com/watch?v=ubm2dYzoDW8