Link to source: https://github.com/EVV1E/waylandcraft
Jokes aside, I've grown to love "XYZ in Minecraft". It's like a newer (still 2011 was a long time ago!) version of "Doom on XYZ".
I love it.
But other than a demo "because we can" I'm confused on what this could ever be useful for. AR/VR prototyping? Virtual showroom?
Or maybe for an online presentation? Stream a video of playing Minecraft and get fancy slide transitions? "let's go to the next slide" and "now we enter dangerous territory".. "over here I can show you how this program looks like in real life"