My guess is that the change is even bigger than we can image. I can see two driving forces: The travelling becomes more cost sensitive and some kind quarantines are here to stay for quite a long time.
The affect to the business travelling will be large. I assume that in, many cases, one must be in a quarantine for half a week and pass couple of healthy examination before entering into a new region. The combination of the quarantine time and the accommodation will cause large changes. At least direct flights will be in danger in thin routes?
The whole dynamics will change but in what direction?