I think a video talk is going to happen as well. I have already heard some dubs say they would like to have that. They think it would be "cool" to have the GB or or bethel heavy give a Sunday talk.
I think attendance will go very high for awhile but once it becomes the normal procedure the apathy will set back in.
Or maybe they'll split the public talk into two parts. One part by a local brother and the other a video message from headquarters.