I find these discussions about the next tour to Australia not happening based in performance terms incredibly silly right now. It's 12 years away and the Lions won't be making decisions or signing contracts until around 2032, with 2 world cups between now and then. Australian rugby could be riding high off the benefits of a lions tour into a home world cup, they could've squandered it all and collapsed, or anywhere in between. The state of the game here at that point is going to have a hell of a lot more bearing than what happens on the field over the next two weeks.
And that's all aside from what will be the real, lasting take away from this tour - a combination of unprecedented financial success and an ideal touring location that is very hard for New Zealand, South Africa or any new destination to match.