I experienced something incredible when many attendees (William, Hitesh, etc and me) are doing the collaborative note-taking. It is quite a sight to see multiple users editing at the same time. It is even better when I realize that I will have a note that is 10x better and I can concentrate more on listening rather than busy note-taking. The power of collaborative editing through wave is a tsunami in terms of its magnitude.
Imagine this in classroom: every class session will have a wave, multiple students will perfect the notes.