As a Boomer myself, a developer, and a real estate agent, I know that what was once thought would happen with the Boomers has changed dramatically, and there's no way to know the extent of the damage.
Many boomers (and others) had depended on their homes appreciating in value, and thought they would be able to sell their homes; and relocate to a new area where living was less expensive for retirement, paying off their new homes with cash. We lived in one of those areas that drew the boomers from southern California that wanted to escape the rat race, and in fact were in the middle of building out a residential subdivision. When the market crashed, the entire area we lived in died. Unemployment skyrocketed, as the area was heavily dependent upon construction, and perfect for retirement (lakes, rivers, caverns, volcanoes, it's beautiful) The buyers of new homes were gone within weeks. All the equity they were depending on to relocate disappeared, as did their retirement plans.
Another scenario is those that refinanced their homes, once again depending on appreciation, and now have over financed homes that are under water.
I think in the areas where the economy is still good, many that planned to retire will retire later. Many of those that planned to move will instead move into smaller homes or condos, or possibly rent apartments.
In the areas where values fell, and the economy hasn't come back, there are many boomers that have lost their homes, renting apartments, and working in service industry jobs if they're lucky.
So in answer to the question, it's anyone's guess. We've never seen this situation before, and we'll learn as it unfolds. One thing is certain, the Boomers will get sick, have hip and knee replacements, need rehab, or work on staying healthy, causing all the businesses in those areas to prosper, and that's one reason why we are focusing on medical office space. It's a growing niche.