This would be awesome to have wall-mouted with touch-screens over lapping them (like on your average tablet PC).
I could see these being great as wall-mounted controls for your mult-room audio system, and as controls for your alarm system (if you had one). Could also have (since I'm thinking touch-screen with these) a GUI based slider as dimmer switches for lights and such.
Thinking about it now, the opportunities really are rather large as to what one could do with these.
Now, for them to catch on and be mass-produced so prices drop.