Don't see how 2-5 are disruptive at all. Small evolutionary steps. Incumbents just starting using/installing those are subcontracting out. Wood frame house today is except for a few more holes and wires in walls largely same as wood frame house 100 years ago. Carpenters still put them together, roofers still put on the tops, plumbers still plumb.

A disruption would be something like we no longer have to build houses we can buy them off of Amazon and have them delivered by fedex.

Yes, that's the kind of thing I was talking about! True disruption, not the gradual improvement that has been going on for 100's of years. Something that allows for quickly building cheap, efficient and environment friendly housing.

What I'm waiting from (purely from an uninformed coolness factor) is automated cooperating agent style construction - a la ant colony or termite mound.