My living room has no hard wired lights, and only one plug is on a switch. Only one standing lamp makes the place gloomy, but the second can't be on a switch. Rather than turning them on and off separately, I smartified them so I can do it via voice or app. Also if I'm cooking and my hands are a mess, I can ask Google/alexa/whoever to set a timer, add something to a shopping list, or tell me what temperature something needs to be. My favorite use is casting computer audio to multiple speakers so I essentially have a home sound system. Makes cleaning more fun. Also not having to get up to turn the bedroom light off at night is transcendent.

Nothing I use smart stuff for is particularly revolutionary, but it's handy enough that I like having it.