You come home after a long day of work. Hungry, thinking about leftover pizza, you say: Turn on oven to 180. Feeling slightly chilly, you say: Turn heat up to to 22. Then you ask, What TV shows are on now that I would like... only to hear a familiar voice tell you Top Gear is starting in 10 minutes. As you enter each room, the lights automatically come on to your desired night-time level and you throw yourself on to the inviting sofa.