No, it’s not a physical manifestation of a computer virus. Made by Japanese artist Mio I-zawa, the mechanical tumor serves as the most biological CPU meter ever seen.
Built as a concept art item, the “mechanical tumor” does more then just look pretty. As the computer uses more and more CPU processes, the tumor will shake, inflate, and move to represent the usage. I’m not entirely sure what the practical application of something like this is, but it sure looks creepy. Maybe it’s something that can be used in the sequel to eXistenZ or something.