I suspect that in the future, the key constraint that one runs into when searching for a home will be the characteristics of the foundation on a given lot: size (max square footage of home it'd support) and strength (max number of floors safely supported, such as three or four stories).
All other aspects will be modular and reconfigurable (⬇️waste). This will allow for a market in reuseable parts of houses, which lets buyers sell off parts of existing home that they don't want or get new parts.