I think the culture is moving generally towards women who is independent, who selects mates from top 10%, keeps relationship with mate during early stages of raising child and eventually moves on with her independent life possibly with new partners. No marriages involved and top 10% of males don't really have to "date".
As we know, history shows us that societies in which the bulk of young men have no prospects for marriage and families are stable and healthy. /s
So governments will find themselves faced with a choice: either force people to have more children, or do something different. Forcing citizens to have kids isn't going to work, even in places like China, much less democracies. So the solution will be to outsource reproduction to government-run factories, where children will be artificially conceived, and then raised in institutions.
really all things we are seeing today, just exacerbated for the next few decades, after which demand for housing will fall as population rapidly decreases