What would you look for in a smart home?
First of all: reliability. The house must be able to retain all its functionality during a power outage.
After that I want security. It must be impervious to unwanted intrusion: either physical or hackers.
Next comes self-cleaning - probably the biggest chore after home maintenance. This would include cleaning the household appliances, too
Talking of maintenance, the house must never, ever require a software upgrade.
After that we can start talking about useful features such as tending the garden, washing the car, cooking meals, collecting, washing, ironing and re-storing clothes - picking up dishes, pans, cutlery, cups and glasses, cleaning them and replacing them in the correct cupboards.
At this point we have a house that just about qualifies as "smart". The key problem is not the simplistic features such as turning lights on or off, setting room temperatures and the like: these are the domain of little 8-pin microprocessors. Describing those functions as "smart" is as sensible as talking about a "smart" amoeba. The big problems are associated with moving household items in a safe and reliable way and it's only what a house can operate on that level that "smart" begins to cover it.