People saying that there'll be no more conventions if the show stops are so full of shit. There are still Buffy the Vampire Slayer conventions and that show finished in 2003. Heck there are still Star Trek conventions and that show (the original) was on like 50 years ago or something. To say there won't be anymore conventions is just wrong. There'll be conventions as long as people keep paying to go to them, that's how they work. Supply and demand.
You have summarized it pretty well.