Hierarchical scaling is a technique where the artist or the author of the artwork uses a relative size to indicate the importance of the depicted items.
It is primarily used in sculpting and painting to show that some objects are more important than others. For instance, in a painting which depicts Royalty, Nobility and the Common citizenry, you might find a situation where the Royals are painted unnaturally larger than the Nobles who would be larger than the citizens.
Its showing the beauty of electronics, and old fashion. It's also showing a modern type because its a robot, and many think that the future of our world.
