3D Object Manipulation in a Single Photograph using Stock 3D Models
Darn, it looks like it won't be long before photo editing software can
   (1) Find stock models for all objects in a scene
   (2) Align them perfectly
   (3) Let you manipulate them arbitrarily
   (4) Render an output picture with all the changes applied that is virtually indistinguishable from a real photograph.Once this happens (and it doesn't look like it'll take long) photography will no longer be an accurate reference for knowledge about the real world.