To confirm that they now do both PCR and RATP tests on arrival, and you can leave after a short wait for the RATP results; no more hours sitting around waiting for the PCR results.

As well, you can get a QR code for your overseas vaccinations which you can add to the HK Vaccine Pass and get entry to the places that now require it. They'll also add a booster vaccination, even though it's not yet required for entry into HK.

Under the new rule, there are no flight suspensions in effect at the moment. Before, there were around half a dozen at any given time.

https://www.coronavirus.gov.hk/pdf/flight_suspension_list_ENG.pdf