Once this situation has "normalised" somewhat (not returned to what we used to call normal, by normalised I mean, we've come to terms, rationalised it, worked out how we're going to deal with it [which might include a vaccine, but I wouldn't pin my hopes on it just yet], and put whatever measures in place we can), then trains, ferries, bikes, horses, carts, and other modes of transport, suitably socially distanced/disinfected/priced/masked may well take the place of the plane - that's how I've travelled most of my life, with the exception of really long-haul.
Cheap package holidays and cheap flights have only really been available for the last 25 years or so. I have a list of places I always wanted to see and it's now highly unlikely I ever will so I'm going to have to be more selective and plan better.
We're all going to have to get used to a slower pace of life; our ludicrously fast pace of life was not sustainable in the long run anyway.
Our way of life, for the foreseeable future, has been well and truly shelved. You could see this as a bit of a rehearsal for climate change, which is not going to go away any day soon.