It's way too soon to tell. Things really are getting back to normal, with leisure air travel returning to pre-pandemic levels. Most importantly, schools have returned to in person instruction. That statement about vaccines losing effectiveness after a few months is a red herring because there is a thing called a booster that mitigates that.
The big question is going to be whether schools place their interest in seeing candidates face to face, and the ability to "sell" in person, above the HUGE cost and convenience benefit to candidates of not having to take time off from school and work, or travel all over the country. If interviews remain virtual after this cycle, it's going to be a permanent change unrelated to COVID and totally related to the availability of the technology and the increase in access for applicants.
It simply remains to be seen. It's a GREAT question, but I guarantee you, at this point in the 2021-22 cycle, no one has even begun to give it any thought for 2022-23. Based on what happened last year, there won't be answer until late next spring or early next summer, and the answer will have nothing to do with the half life of the vaccine.