Kids need kids. Parents know that. I think, (in my limited opinion and observations of those around me), that a flight from the city will happen but online school will be temporary. A lot of the college examples you are using are online because they are cheap and when a 4 year degree is 120k and up knocking out 12 or 20 credits for a few thousand is a steal! That you might be right on and may increase in attendance. I think metro schools are setting themselves up to fail worse than they already are and that's unfortunate because those kids need good schools more than anyone!
I'm with you on the working from home and getting away from the crime and traffic. That is here to stay and many businesses will cut costs because they don't need the massive office space any longer. Will be a fun 5 years coming up. I also think there is going to be a swing away from online retail in the near future as well as people start to really focus on shopping "local".