Aren't the gausian splats the output here? Or are these worlds fully meshed and textured assets?

From my understanding, admittedly quite a shallow look so far, the model generates gaussian splats then from that could implement the collider.

I guess from the splat and the colliders you could generate actual assets that could be interactable/animated/have physics etc. Unsure, exciting space though! I just don't know how I would properly use this in a game, the examples are all quite on-rails and seem to avoid interacting too much with stuff in the environment.