They are becoming housing in suburban areas. But a vast majority of that land won’t be touched because it just isn’t desirable. I seriously doubt there’s going to be a land shortage in North Dakota. You can see this even in very populated countries.
Population is projected to have a downward trend over the next few hundred years.
As quality of living and healthcare improves, people on average have less than 2 kids. I actually wouldn’t be worried at all about overpopulation; many scientists who study it aren’t. We aren’t yet at the top of the curve, but we also aren’t projected to get even close to our carrying capacity.
As for food growing, hydroponics is quickly being a forerunner in food production. It uses less land and less chemicals to provide more food, and can be stacked to provide even more food in a small area. In the late 1800’s people were panicked because they were afraid everyone would starve to death as they couldn’t produce enough food. Then synthetic fertilizer was invented.
Grain crops certainly do take up a big amount of our fields, but one of those is corn; not edible corn but ethanol. I fully expect the market for ethanol to drop dramatically in the next few decades because it will no longer be needed for gasoline, which will free up a lot of land.
The pandemic and the resulting mandates had a bad effect on cities and it caused a lot of people to leave, which is why the suburban market has gone insane and caused home builders to go into a tizzy. But it will even out, and a lot of those people will move back. In my area a bunch already have. They didn’t like how quiet it was
IMO, The biggest problem that the horse world is going to face in the upcoming years is the reckoning on herbicide. Farmers have been relying heavily on them for decades to make quality hay, and it’s just now starting to come out that those herbicides have potentially devastating long term consequences that we don’t really understand yet. I would not be surprised if a large majority of the herbicides and pesticides that we currently use are banned or heavily regulated in the upcoming decades.