Well, if you look at any form of interactive 3D multiplayer game, it really is here, it's just that there's so much to pull apart, in terms of the nuance of online interaction with humans, that we're reluctant to move beyond the cartoonish worlds of video gaming.
We have tons of really popular game titles, and millions of people playing or watching or chatting, as tournaments unfold. We fill convention centers with people playing games, and stream a webcam feed of people at conventions playing the games. But it's all still games, world of warcraft, fortnite, minecraft, eve online.
So, what if it wasn't a game? What if it was more than video conferencing? What if there was more going on, and an immersive system of interaction closer to first person gaming engine was as relevant, in social terms as facebook, twitter, bitcoin, uber, amazon, google, github, along with email, chat, and file sharing, all as a single service?
What if all your home automation and mobile devices were integrated? What if it gave your GPS location to the world, and authenticated you selectively as context sensitive pseudonyms, or conversely your authentic legal identity, securely and as preferred?
How much of that is possible? And how much of it do we actually want? But most of all, if corporations collaborating with governments, or an open community of enthusiasts, put this in your hands, would you trust it? Would you put all your eggs in one basket like that?
How many IP addresses would a system like this require, to keep each context secure from another, to preserve pseudonyms, and not leak GPS location information? What about background audio, and geolocation by timing attacks? Plus the basics of platform security, knowing what we see every day in terms of zero days getting dropped, and leaving people out in the open?
It's cool to think about, but our technology as it exists, is a drafty outhouse, compared to the brick shithouse we really need.