Theater visits were already down prior to Covid. 5% in 2019.
As Phin (and I many months ago) and others have posted, boutique theaters (with food etc) will be what survives This has been forecast for literally decades.
I am interested in the July release of Black Widow. Curious to see how it does when compared to similar Marvel films like Ant Man, Black Panther, and Captain Marvel (in terms of scope)