As Wallet wrote, it's already happening. I have a cousin lives in Buffalo, Wyoming. He tells me more and more people moving in this year than in the last five.
I live in Northwest Indiana which is basically a suburb of Chicago, only with much lower taxes, far less crime, (excluding Gary area), and generally better schools and standard of living. People fleeing Illinois are moving here in droves. Frankly been that way for awhile, but this year has seen a serious uptick. Existing homes sell in less than 30 days, most in less than a week or two. When I sold my home earlier this spring I had 3 offers in 24 hours, all exceeding my asking price.
Bottom line, sane people want to escape the urban madness and crazy taxes. This won't change anytime soon. Lots of signs and bumper stickers. Don't forget why you moved here.