The landscape will change but not in the sense that some people are saying.
Some of the AMPs that exist now are going to go under. Months of no customers and they won't be able to pay their rent. You're going to see this everywhere though. Restaurants, bars, etc. are going to close for the same reason. However, when people are no longer scared of coronvirus (however long that takes), then new AMPs will open under new names.
It's simple supply and demand.
Demand - There are guys even now who want to continue seeing providers, right at the height of the panic. Down the line, when the medical community finds a vaccine or cure, people won't think about COVID at all. Think of it this way - hobbying is very high risk for STDs, some of which are permanent and some of which are terrifying (AIDS). Yet hobbyist continue to do this. They won't be thinking about a flu virus!
Supply - Being a provider is a very lucrative job for an uneducated girl. The popular ones likely make way more than most of their customers, especially when taxes are figured in. Also, all the girls that are currently working have no job experience or skills for a regular 9-5 job so there isn't much opportunity for them. They are waiting like the rest of us until they can go back to work. Same for the mamasans, owners, etc.
AMPs will be back, just like everything else, when COVID runs its course.