Haha, yeah, I read that and thought of WoW.
But they're probably talking about virtual reality games. VR games over a network are pretty much impossible right now, I think. Maybe over a small network like a LAN, since we can get much faster speeds than the internet (100 mbit connections over ethernet, and that's standard in every computer now), but any widespread VR game with thousands of players would require a pretty huge amount of bandwidth, both for the players, and for the server.