Ok, so why 'real-time generated' at all? Now we're just doing VR MMORPG with an expensive implementation detail that doesn't make an end-user difference?
Real-time generated because it will respond to the players to feel more alive. Worlds right now are mostly static. Imagine Star Citizen but you don't have to wait for decades for it to be developed because the galaxy creates itself as you explore it. No more invisible walls.