Thankfully I work in a university so no pressure to stay 'on brand' 
We are delivering 90% of our teaching online until Christmas, although will hopefully be able to steadily increase the amount of face-to-face stuff we do with students, which is important. It's definitely the end of the packed lecture hall though.
However my personal teaching timetable means I will probably only absolutely need to be in once a week until January, and possibly even less afterwards awaits accusations of being a lazy academic. I may decide to head into the office once a week just for a bit of variety and to catch up with colleagues, but all meetings have been scheduled online for the next academic year anyway.
For me, it works. I love being at home, hate the commute, have been working very productively from home. I have so much more time in the day for family, exercise, baking, gardening. I'm even doing some online courses that I wouldn't have considered if I had to factor a commute into my working day again. I still keep in close contact with my students, and in fact I am probably more able to respond to them quickly with a remote set-up than if we needed to arrange eg: office meetings. The feedback from them regarding online teaching has been really good - much better than I expected tbh! Although I do feel a bit sad for the new freshers who will miss out on a lot this term.
I agree though that flexibility has to be key. I am incredibly lucky to have a decent home set-up but lots of my colleagues don't, particularly the younger ones. The social side of work has never been a big thing for me either - I like my colleagues but they're not my mates - so this doesn't bother me, but again for some it's a much bigger deal.
I do think there will be a pretty big shift though. As a PP said, the genie is out of the bottle.