I think a similarly rendered image not using wave optics would be a great comparison here. From my understanding wave optics can be a more accurate model for materials that can interact with the frequency of light. Will diffuse material such as this macbook benefit much from using wave optics vs normal ray tracing?
Agreed that that would be nice for clarity! I would say that I think the macbook surface would still benefit noticeably from wave optics, though. The human eye can pick up a lot of visual deltas that arise from the small microsurface variations on a surface, the slight imperfections of a material (no material is perfectly diffuse or glossy), etc. Without these, I'm guessing we might feel that the image is "missing" something