I think in the future we will see more homes with:

Gray water recovery

Thermal batteries (hot and cold)

- Excess solar energy can be use to "charge" the hot or cold reservoirs for later use depending on season.

Effluent heat recovery

- Home appliances generate lots of heat (clothes driers, ovens, refrigerators, ...) that is currently vented to the atmosphere. Capture and use it to "charge" the hot battery.

- I'd imagine a water (or other liquid) line that connects to each appliance's exhaust via a heat exchanger to make the above more efficient as a standard part of home plumbing.

Smart appliances that sync with the home's energy system

- eg: clothes dryer that has the option to turn only when there is excess electricity available. Same with EV charging, etc...

[Edited for typos]