UK virtual reality firm Improbable raises $500M
The big question is, what do you do in a big virtual world?
There's a "build it and they will come" assumption here. There's Second Life, which peaked years ago. There's "There".  There's High Fidelity, which is a higher-resolution Second Life with few users.  Most of those can be used with a VR headset.  But nobody cares.It's not a technology problem. The current technology is marginally adequate.  It's lack of market interest.