It's Pong! For real! 
Just when you thought that the human ingenuity had reached it's pinnacle, you see something that totally blows your mind. Take for example, Mechanical Pong. It's not a video game, it's a machine that emulates pong... I don't know what else to say. Does the world need this? Is this 50 years behind it's time? Is there any purpose for it? Who knows. The important thing is that it exists and it wants you to watch the video.