That said, there's horrible tearing and it's also really slow when you are near another box and looking at it.
google-chrome --enable-webgl --ignore-gpu-blacklist
I figure I might as well let you know what you're missing. The guy coded up a 3D world in which you walked around as a square with text floating above your head. It reminded me of World of Warcraft and other MMOs, despite its graphics being far below those of Minecraft.