Just think about the incredible images from the full colour HD video cameras on the iss as it orbits the earth, then imagine the same on a spacecraft orbiting Ceres, Mars, a comet, Jupitor, Saturn etc. Not only would it look spectacular, but a lot can be learned from close up observation of the movement of the atmospheres of these celestial bodies. Who knows what unexpected things we might see. For instance, there could be geological or atmospheric dynamic activity which would not be apparent in a simple black and white still image.