I like some things reasonably smart (boiler, ventilation), devices that learn from the occupant’s behaviour in order to be more economical with energy for instance. I'm not a fan of other "smart" tech, like lights, stoves, ovens, fridges, etc.
The moment you make it clever past this you incur the overheads of the whole system production in the efficiency cycle. That means the manufacture and distribution of a complex computer system.