Displacement maps can be used for SOOO many things. Example I saw recently on a tutorial page was a cylinder with a bump and texture to make a aluminum trash can, without displacement it looked to clean but with a displacement it looked scuffed and dented like a used aluminum trash can and much more real. Here is the link: http://www.mossor.org/Desktop/Tutorials/garbagecan.htm bricks etc etc. lot of stuff to rethink. I don't think that displacement maps are going to replace all morphing or geomerty tricks, but it's another tool in the bag and can really help in some situations.