Lights come on when I go into a room and it's dark enough, go out via an app or when I leave the room - saves energy.
Adaptive lights change brightness at different times of day and based on ambient conditions - better living conditions.
Lights that come on when I'm not in so that it looks like I am - security.
Fridge/freezer knows what I have bought, can warn me when something goes out of date - safety - and can suggest menu choices based on what I have and how long I want to cook for, also generates shopping list (or arranges a delivery automatically) - convenience.
Thermostat in every room along with occupancy detector to heat that room - convenience and energy saving.
Washing machine that reads clothes and performs appropriate wash/dry cycle - convenience and energy saving, especially if coupled with sensors that can detect how dirty they are.
Appliances that "'phone home" to allow wide-scale co-ordination of cycles - energy saving.
Appliances that monitor usage and can arrange for repair/service - convenience, reduced downtime.