The above video demonstrates the true extent of Metroid fandom. This guy didn't just re-skin an arcade cabinet with fanart. He built the damn thing himself, and even included an illuminated Mother Brain behind a plexiglass window. That's dedication.
Unfortunately, the video's not really the best presentation of the unit, but we can't complain. Sure, it's overly dramatic, and moodily lit, and it has way too many quick cuts for us to really ogle the finer details, but this dude built a Metroid-themed arcade cabinet. What else matters?