Two cool projects have come across my reading recently regarding creating fake displays meant to trick people into believing they're somewhere else.
Is a cool project to show off the kinect's possibilities. Essentially you can force the perspective that someone is looking out a window based upon where they are standing in a room. Downside is that if a second person is in the room, they don't get that perception.
Artificial skylights may be the most cyberpunk thing imaginable. The science behind it is pretty cool though, but for something like $40k it's a bit out of my price range.