It is very impressive. If you think about it though, you realize there's not limit to how good this scheme can be (for singleplayer) -- the limitation is essent

It is very impressive. If you think about it though, you realize there's not limit to how good this scheme can be (for singleplayer) -- the limitation is essentially the bandwidth. Now the impressive part is that they can adapt to bandwidth conditions and do it all while keeping the premise of required computations < mobile capacity << actual game.