I should have put more emphasis on "as we know them." I think think cities will exist for sure, and they might be better. So I agree with you there, and I actua

I should have put more emphasis on "as we know them." I think think cities will exist for sure, and they might be better. So I agree with you there, and I actually hope the same. But modern cities have had two phases: first industrial growth, and more recently white collar/information worker city cores. Industry will still exist, but has already moved further out from city centers and cores. Currently, the life blood of large cities is closely tied up with the mega corps having their ego towers there and thus attracting innumerable highly paid workers which then spend their money in those city cores. With that going away and/or substantially changing, cities will change drastically too.