They mention some possible applications in the video. Training environments for robotics (use sample data to simulate the surface of mars or the inside of a nuclear reactor), educational worlds for students (like the old Encarta virtual tours), and disaster preparedness simulations (e.g. training firefighters on an endless variety of burning homes).

Obviously, none of these are super viable given the low accuracy and steerability of world models out today, but positive applications for this kind of tech do exist.

Also (I'm speculating now instead of restating the video), I think pretty soon someone will hook up a real time version of this to a voice model, and we will get some kind of interactive voice + keyboard (or VR) lucid dream experience.

Arrogant profit seeking capitalist dick measuring that will break our societies and ours and our childrens worldviews under some pathetic label of "exploring a new scientific frontier"