The thing is that NZ and Oz are in a different situation. They have managed to suppress it, but not eliminate it, which is a lot easier than what NZ has done. But they are still getting community transmission occurring, so it appears to still be spreading silently in the community.
Exactly. The Trans Tasman bubble is just a concept at the moment. Its hard to imagine it working in the near future. Maybe by Xmas their results are almost zero everyday, half of that will be due to Summer. You really need a 10 minute test at the airport that is reliable
They were damned close to zero before we were. There's very unlikely to ever be a 10 minute serology test available at airports that'll provide any useful information. There may be "quick" PCR tests eventually, but it'll be a hall of a bottleneck with what's possibly available now - and they'll still have the 20-30% false negative issue (that we see in NZ as "probable" cases).
There will need to be mutual trust from both sides.