Most multiplayer games are quite playable over the network. The difference is that the graphics are rendered locally and the world state is streamed over the network.
A fast enough pipe (100Mbps fiber is quite common and cheap here in Europe) could deliver good results, even if the whole world is rendered and then streamed as video.
A fast enough pipe (100Mbps fiber is quite common and cheap here in Europe) could deliver good results, even if the whole world is rendered and then streamed as video.