I'm far less concerned about whatever "soon" means (things are ready when they're ready) than the assumption that the proper medium to release patch notes is a show.
Why not though? It's a cool way to do it. Not like they give us those patch notes too often so might aswell make an event out of it :P
As long as they give us detailed patch notes in writing as well, I am fine with them putting on a show. And tbh, I am just glad for the silence to be breaking.