Quake was not really well playable over modem yet, but Quakeworld was. It's mentioned in the article as the next thing coming.

Strange how much new area was quickly covered in such short time. Of course, the platform itself was developing to make this possible. One couldn't have done dynamic lighting 3d worlds with a 386 or multiplayer 3d shooters with 2400 bps modems.

There have been attempts to board new, moving platforms like VR but no breakthrough yet?