Somehow it looks like the furniture is not in contact with the ground. I think it´s the missing shadow, especially at the couch and the lamps. The vases look like they really stand on the floor, because they have some shadow. Another thing is the scale of the wood floor, I think it should be a little smaller to make it look more realistic. The wall is a little too flawless and a picture or shelf would help to create a cozy atmosphere in the room. That´s just what I think, as a blender beginner. Perhaps one of the real artists could help you more precisely.
Overall a nice render and a great wall paint