There has been articles about the future glut of boomer houses for at least 10 years. I used to buy into that statement, but I keep seeing big new houses getting built in the new subdivisions. So maybe one day, but not today.
I used to work in the mining industry, and moved from remote little 'town' to remote little 'town'. Many of the other folks I worked with would buy a house in the location, but then be unable to sell it when they were transferred, because these places were small and remote. The company often ended up buying the house. Having unsellable houses has always happened in rural areas. If one travels around the north central prairie of the USA you will see many old abandoned farm houses in remote areas. One clue as to when they were last occupied is if they have a power line to the house or not.
Also, I've had two different elderly relatives who would not leave their homes even when they no longer could take care of the house or themselves. It was not until they each hurt themselves at home that we were able to get them to a proper care facility (directly from the hospital in both cases). Those homes were a wreck needed to alot of repair to sell. On the other hand, I used to travel alot, and the airport van I regularly used would sometimes stop at one particular retirement apartments. The van would pick up a couple in their 60s who had sold their house and moved there as soon as they retired. That was their base, but the spent most of their time traveling. After they were dropped off one time, all of us boomers in the van were jealous, and said that is what we wanted to do, rather than our parents, who thought of retirement places as warehouses of death.