Robot heads symbolize digital hardware and programming. The eyes of robot characters mimic real life. In the digital world very often pushing the limits is to create new versions of what has already been done by improving them. See the various versions of photshop or Windows. Each new version pushes the boundaries.
Study of Robot heads metaphor of a new digital version. A new robot head emerges, a new version .. The other robots seem surprised by this emergence of a new version.