There is an emerging aviation market in Australia that is regulated by CASA and that is the increasing use of drones. Already there are food delivery services in Canberra. The missing ingredient for a lot of what has been listed is consumers. America has multiple times the number that Australia has. Fishing, hunting skiing trips? Honestly who is going to spend that money to go heliskiing in Australia. NZ and Alaska have much more inaccessible wilderness than here. Regulation is a part of the issue but not the only barrier to the sort of aviation activities referred to.