Gazing into my crystal ball, I could see a switch to split systems eventually. (not before I retire and I'm not yet 50... I suspect by the time my teen retires?) So much high efficiency low voltage stuff out there I could see them start to develop 12VDC systems to switch lighting and other low current devices to. Especially things USB and/or portable. imaging plugging your portable device directly into your car or special outlet in the house, sans charger because its all converted at the panel more efficiently than the bricks could ever think about doing.Yep... I have LED reverse lights in my car that will just about set your eyes on fire and they only consume a couple of watts. One or two would easily light a room.
BTW - Get LED reverse lights. Amazing upgrade!
Especially as more and more homes look at solar and battery bank options to store the excess solar collected during the day.