As boomers retire, the pressure on the 1650 square foot home returns--around 2014. A new crop of McMansioneers will float those boats out the door, and compression between a 1650 square foot house will be $400 to the McMansion 3200 square footer, and all the additional upkeep costs, like inferior construction.
You can't get a home built 16 inches on center with 18 inch real wood joists after 1964 in my neighborhood--the thirty year old homes are crumbling, the 50 year old smaller homes, not a eyeball catching, but rocks.
Again, you can outsmart yourself here, but I perceive by the 2016 time frame, we will see compression, and regression to the mean in the modern era post WWII will begin again.