I think there will be problems in housing, but not the problems this article describes. (Yes, I am over 40. And no, a 5% mortgage is not remotely problematic.)

With increased automation and wage stratification, there will be fewer jobs and fewer good-paying ones to allow people to buy houses. The price of housing has always marched upward, but it will get to the point where only the wealthy can afford a house.

That's my guess, anyway. Time will tell.