Just thinking out loud a little bit, and I've said this before. But I think we may be in this type of housing market for a while, or at least until the baby boomer generation starts to pass away/move in to retirement homes. That's a glut of houses that will then show up on the market. Now, do I think it's going to cause a drop in housing prices, no. But I think the supply/demand issue we are experiencing now will be corrected at that point; unless housing construction drastically increases.
I have wondered for a while what would happen once baby boomer last homes go on the market. I initially thought they'd cause a decrease in housing prices. But with demand so high, I think it'll level out the increases. But this would still be several years away as they are not passing away at a large rate yet, at least that I know of.
Yes, my parents, my in-laws, and 4 neighbors are all empty-nesters who don't want to move out of their 2,500 SF houses. My dad said he'll only move out of his house in a casket.