All of the light switches, blinds, alarms, climate control, music, TVs, etc could be manually controlled at first, but there's a system that watches how you change all of them and coordinates it with your location and the time. It could look for patterns of doing several things in a row or doing them at the same time, and either offer to or just start doing them all together for you. Like you normally turn on lights 1, 2, and 3 when you walk in the door from work, so it notices and starts turning them on for you just from opening the door. Or you normally turn off lights 2 and 3 and turn on the DVD player within 5 minutes of each other, so it starts just turning off those lights when you turn on the DVD player.
Basically, something that notices what you already do and tries to do it for you, without you having to program things in with a smartphone or something. I bet normal people would love that. As long as it wasn't laggy and buggy, of course, which could be easier said than done.