The first boomers (born in 1946) turned 65 in ~2011.
We should be seeing a start of some sort of trend if these folks are unloading their assets.
BTW, my father-in-law is one of those leading edge boomers. He retired in place at 65 in a house he bought 10-12 years before retiring. He’s living off social security and a part-time gig. He’s not pulling from his retirement account, not moving, so I have seen no immediate unloading of assets.
Plus, if they were unloading assets, it might even be stimulative to the economy, as they would be unloading for the purpose of consuming. Rather than saving for retirement.
My gut says that the impact of boomers unloading assets is greatly overexaggerated.