You sit in the black recliner and it leans back just a bit. You find it quite comfortable and relaxing. Now, facing the flat wall, you notice words and images forming there as on the face of a huge monitor. The chair's armrests, you realize, have built-in touchpads. Moving your hands or your fingers on the armrests causes images of your hands to move around the wall screen. The keyboard is suspended easily within reach and you swivel it around so that it stops in a perfect typing position, without blocking off either of the armrests.
Now that you're settled in, you look back at the wall and recognize the simple, menu-driven interface: