Has anything fundamentally changed (in the long-term) about the short-term rental market? It's clear Airbnb would likely have a substantial drop in revenue, but they only have to make it through the crisis.
What will this mean for the short-term rental properties themselves? There could be a new supply of housing on the market, as much of it was speculatively picked up. It's true that you can earn more operating a unit as a short-term rental, however in aggregate only so many can do that before demand dries up or price competition undercuts the increased profitably when compared to a long term tenant.