I've got smart shutters that open and close automatically based on time, smart awnings which lower or raise based on the sun, to allow air flow when the shade isn't needed, smart lights that can be turned off all together with a button near my door when I leave, movement sensors in a few rooms that turn on the light but only at certain times of the day (essentially I don't want my corridor light to flash me when I go to the bathroom during the night), energy meters and smart plugs that allow me to optimize my electricity costs.

It's not for everyone but it's quite useful.