Today's new federal restrictions include - no more than 2 people together in public that aren't from the same house, and we are only allowed to go shopping for necessary items now... which means we could get in trouble if we are caught buying any toys.
I think that would prompt non-grocery stores to close down now, as there wouldn't be enough "essential" items for them to make enough money to stay open.
I wonder if this will mean Post Offices will close up now as well, as they are privately owned franchise stores, so if they aren't doing enough business at the moment, they might follow Myer's example and shut down for a while.

WA is also looking to close their borders... not that there would be a lot of land traffic across the WA border, so with international travel shutting down, it will pretty much close down their airports completely.

With every person arriving into the country being quarantined for 14 days at a hotel, it should mean the focus can be shifted towards responding to and limiting "community spread" cases (ones spread between people who haven't been overseas).