If people adapt, there are still options for life in ex-agricultural communities. Small-scale farms can make excellent environment for tourism, as many city dwellers don't exactly enjoy living in a city, and want some peace on their holidays. Remote work is also a possibility for an increasing number of people.
Smaller post-industrial cities could also be a good option for commuters, if they are located close enough to big, living city. Many are not, which admittedly is problematic.