Machine hardware evolution is slowing down, pretty soon you can buy one big ass server that will last potentially decades as it would be purpose built for ai.
Things like 'context based home security' yeah thats just, automatic, free, part of the ai system.
Everyone will talk to the ai through their phones and it'll be connected to the house, it'll have lineage info of the family may be passed down through generations etc, and it'll all be 100% owned, offline, for the family; a forever assistant just there.