I agree that this is really cool, but this is a very contrived situation where the entire universe is arranged in such a way as to form a sort of fixed point. The vast majority of configurations of the Game of Life or of the real world are not fixed points and would break the clever tricks that are used to make this.
Also, because the simulation is infinite and speeds up and simplifies itself as you zoom out, you don't properly appreciate the fact that every layer is a thousand times slower than the layer that simulates it and contains a thousand times less cells (I don't know if it's a thousand). If you transposed this to the real world, it would take one kilogram of computing substrate an hour to simulate one gram of matter for 3.6 seconds and that's kind of useless.
Also, because the simulation is infinite and speeds up and simplifies itself as you zoom out, you don't properly appreciate the fact that every layer is a thousand times slower than the layer that simulates it and contains a thousand times less cells (I don't know if it's a thousand). If you transposed this to the real world, it would take one kilogram of computing substrate an hour to simulate one gram of matter for 3.6 seconds and that's kind of useless.