It would be great to see, but in reality it will stay nothing more than a dream.
At the end of the day, Darwin would offer no real improvement in convievence or cost over Singapore, China/HK, or the ME. Most of those have plenty of LOCO and full service carriers offering a plethora of onwards connections anyway.
Other than the romantic idea of Australianism and local jobs, there is no real point. Any investment could be better spent elsewhere.