Imagine listening to your favorite music in the Den. You walk to the bedroom, and since the "house" tracks you, so does your music. Speakers in the hallway and any room you enter get switched to your selection. If you like the lights a different way than your spouse, the smart house would adjust to YOU without your need to ask or press a button. If you had TVs in every room, your TV selection would appear on the room's monitor as you entered. Of course TWO people in a room might need some clever "arbitration" programming, but that's another bridge I'll cross when I come to it.

Dave