Somehow I expected it to be about the life of a tracking pixel, through ad networks, CDNs, iframes, and it's ultimate legacy as small point of data in an analytics log trace.
Working on pixel phones, "pixel 2018" is a common moniker for pixel 2 before its model name is chosen, relatively late in the product development cycle. Before then it was wahoo or taimen (or other things before directors settle bikesheds).