The "rules" will change over time. Queensland has just reopened its borders to other states. Once covid beomes less lethal to the point of being the same as the flu or lesser, there is no justification to not go back to the way it was. Omicron looks to be way less lethal than delta but vaccination would be a factor influencng that result.
I believe that the state governments have also abandoned contact tracing now ( not sure about Western Australia though, their premier is still scared out of accepting the inevitable reality and is still keeping others out of his state).
One other thing about international travel is that, including being fulling vaccinated, you'll need to go into quarantine once you get here. Those facilities that are often shown in the shock horror posts are for the incoming travellers since hotels won't have capacity and don't prevent the spread of covid. We've had cases where covid was spread in the quarantine hotels.
