And what about 9/11? That was also predicted to be the end of ALL mass air travel, not just business travel. Lots of experts suggested that people would be so scared of the prospect of their plane becoming a weapon that they would change behavioural patterns in favour of driving. Some were even making educated guesses on the number of surplus road accidents to occur as a result of that shift from flying to driving.
In the end of the day, people remain people, not biorobots programmed into performing a set of instructions over and over again. And the latter is precisely what cancelling all meetings forever looks like. Satisfaction and productivity in a job as a laptop operator is a lot lower than in one where you actually go to places, meet people and your brain is far more stimulated then in the same room behind the same screen day in and day out. Not to mention that business travel isn't only about meetings. In Europe, a massive number of families live in separation because their members work in different countries. Those are people who fly literally every weekend - because that's the only way they have to keep their job AND their family. Movement of skilled manual workers will also not stop being a thing. Even during the April lockdown there were flights with construction personnel, crop harvesters, ship crews and all sorts of other working people who need to be physically present at their place of work. So, while the premium cabin close to the pointy end of the plane will likely no longer be there on most short-haul routes, volumes will still remain decent enough to eventually give jobs to those who want them badly enough and are ready to do whatever it takes to get there.