I use a connected smart bulb, that has color changing. During bed time, I use it for reading books, and before sleeping, change it to a night light. I use it as a soft light when watching movies on my laptop. This is a convenience for me.
I also use smart lights to automatically turn on and off inside my home, and outside, in the portico.
I use automated socket outlets to turn on / off the water heater in my bath, on a schedule.
A lot of advantages in these things is in the option to schedule them, or make them act on the input of a sensor (movement, light, etc)