The surge in cases in Victoria is going to push back re-opening states and their borders. And with NSW not wanting to close their border to Victoria, QLD won't risk opening up their border to NSW, as the virus could spread into there from Victoria.
And if NSW records some community cases in the next couple of weeks, we could see a stalling of their re-opening... which could prevent the proposed toy reveal at Hasbro's Sydney office at the end of July (it is yet to be locked in, but might be conditional of the virus status in NSW, and how many people can be in the one room in July).

According to one of the news programs yesterday, the reason why Victoria has had this new spread of the virus that other states aren't seeing, is (according to them) that the Victorian quarantine hotels (for the people returning from overseas) were being guarded by private security, who were not as vigilant at keeping the integrity of the quarantine (cleaning and isolation regimes), so they were getting infected and spread it to their family and friends when they went home.
Other states with returning people were apparently using defence force (army) personnel who are trained to be strict and self-protected.... because other states (NSW, QLD, WA) have also been having thousands of returning citizens being quarantined, without the same outbreaks in the community that Melbourne has seen.

In contrast, the other day saw just 2 or 3 active cases left in WA and QLD, who are all in quarantine hotels. I think NSW is close to being the same, but they are still getting returning citizens, which is making their daily case numbers look bad, but most of the new daily numbers have been put into quarantine hotels.
How much longer are we going to be having returning citizens, so that we can stop having people bringing the virus into the country... and we can re-open faster when the remaining active cases are resolved. People have now had 3 months to return after our borders were officially closed and international travel was banned, and even though it was difficult to get flights back from some countries at first, how much longer does it take people to find their way back. If this is going to be an ongoing trickle of returning citizens for many months, maybe have them arrive at an off-shore location like Christmas Island for their 2 weeks of quarantine, and only allowed back into Australia when they have tested clear over several days (because none of the covid tests are 100% reliable and often giving false positives and false negatives). If we had been doing that from the start, we wouldn't have had this Melbourne outbreak, because we wouldn't have had infected people landing on the mainland until after they had recovered.

I wonder why we don't have the states & territories that have been cleared (or all remaining cases are in quarantine) open up their borders with each other, so that it helps tourism and the national economy (jobs) more to offset the slower opening rate of Victoria.