It's vaguely possible that we might find a hungry enough hotel in Las Vegas, but we'd have the same issue as we're going to have in Reno. Also, the room rates won't be any good — look what the Atlantis/Peppermill did to Renovation. (For details, go to the Atlantis hotel's web site and quote room rates for the week before and after Worldcon.)

I'm not saying it can't be done; I'm saying it's not as easy as you are suggesting it is. I'd admire anyone capable of talking these hotels into deals that don't end up costing as much as any given convention center and wouldn't change the nature of the convention entirely (say by prohibiting costumes and parties).