I believe that the casinos are not owned by the government that we can assumed that it has been abandoned. if it is owned by private individual then the most logical thing to think of should be that the owners of the casinos will change based on the reality that is on ground. there is nothing that stops them from adding sports betting to the casino centers such that when a gambler comes in, he has the option of either playing in the casino or gambling on sports games. maybe those that are currently resident in Australia can give a more accurate information on the current state of thing but in general gamblers always opt for what interest them and what promises them good returns. the fact that sports betting and sports in general has also become one booming industry is going to be part of the factors that will drag so many gamblers to shift their loyalty from other gambling options to sports betting option.