Melbourne to LA flight is currently 13-16 hours. This plane would cut it to around 8 if they could extend the range and it would make the flight bearable (I find that first 8 hours are OK but anything after that slowly turns to agony). But the distance between Melbourne and LA is 6883NM and even Brisbane to LA is 6246NM. So, Australia is still out of reach. One could do Brisbane to Honolulu at 4088NM and then Honolulu to LA but with the layover total time will probably be the same at best or much longer. Maybe one day...