A question in my mind is, will most presentations made at SNO be made public by the corporate sponsor after the conference. I believe that if not the entire presentation, NWBO will at least make the slides available, whether we can hear the presentation, or not.
I don't know if those who pay for the conference will in anyway be limited, or have access to every presentation, essentially making the all plenary. In a normal conference, many presentations would be done simultaneously so participants can only select one to attend, they could probably make the virtual conference work the same way, but I think it would be smarter to permit all who pay to see everything they wish to. I believe all would want to take in all presentations deemed important enough to call plenary.
I suspect that in the future many conferences will become hybrids, those who wish will be able to pay for a virtual version rather than being able to attend, even though presentations will be made live at the conference.
In the case of this conference, I would suspect that the NWBO presentation would be produced in advance, but presenters might be standing by to answer questions once it was shown. I would think that taking in a presentation at the time it was scheduled should allow participants to ask questions, but I'm uncertain of that.
Gary