The self shadowing parallax? The main thing is that it's self shadowing, it cast shadows. It also occlude it self, meaning that you can's see the other side of a stone for example. It very cool..
I would leave it as is. Its a couch, move on to some other things. Looks really good. You could have got a lot more resolution out of the wood parts if you tiled them in sections. For example the two legs could share the same UV space. The wood between the legs could share the same high res emblem and for each mesh section…