I'm impressed by the coding skill to achieve a seamless integration and "usability".

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"