Unsustainable costs are already making city living harder again, after a period of relative affordability that marked the end of urban decline and beginning of gentrification (at least in the US). Technology is improving - I conduct the vast majority of my law practice without needing to have face-to-face meetings. Of course, I still need to go to courts from time to time, and those are fixed in their location.

However, if safety concerns increase as time goes on (see subject line), then there could be an increased push for telecommuting and other alternative arrangements.