I'm thinking that as the baby boomers age and retire, and as their retirements shrink smaller and smaller, there will be more demand for smaller, more affordable homes that still retain high quality.

Something like this home.   Nearly a micro home, this would be perfect for a retired couple that wanted to live in style but without a lot of cost.  Maybe sell the mega mansion, and put this deal together and bank the remainder of the money from the mega house sale.  Grandkids would love this as well.