Please do correct me if I'm wrong. But also; so people are leaving the cities where they appear to have careers/work/friends and are heading to the suburbs during lockdown because of the virus situation, while businesses are laying off and contracting/shrinking/making losses and are going out of business?
I know several people who have moved out of cities over the last several years actually for various reasons, mostly the accumulating cost and declining benefits, especially with the consequences of political and government policies starting to impact communities along with the overall cost of living increases. This is not a coronavirus trend, even if that has only accelerated things.
What this likely is, is an industry PR story to place the thought into people's minds to move to the suburbs to, with slight panic, hope they can find buyers for all the buildings they were committed to build even before this whole situation. It's the same old developer industry super-cycle; push and pull, ebb and flow of urban and suburban development cycles, only exacerbated by poor material and low skill construction meant to last for one cycle.