Home automation is something that can be handy. Example: When I'm watching a movie, I like all the lights nearby to be off. Being able to say "Turn off TV lights" and have specific lights turn off is nice (and expensive - all those smart switches cost money).

Being able to make a sound when an action occurs (e.g. garage door opens alerting you that someone has arrived home) is nice.

Not sure what else. But satisfaction seems to be high. I think it falls squarely into the category of "Seems not worth the expense, but once I have it, it is kinda convenient".

(I do not own one).