I did a short stop in Seoul two days ago, and visited the famous COEX shopping complex on the way.

On the ground floor there was a touch screen panel that might be just the right thing for your home. Your very, very big home that is

Instead of having a boring old floor plan on the wall, they had installed large touchscreens (about 1m x 1.5m in size) that allowed people to interactively navigate the floor plan of the complex. You could do your usual touch and drag to move around on the map and tap to select targets for more information.

(click for larger images)

Maybe not quite the thing for your living room but if you have a need for a control center then this might be a nice accessory I live in a smaller apartment so I will be trying out the Asus touch screen next week instead.