[Animats]

There are lots of virtual worlds. There, Second Life, etc. None have become really successful, but they continue to work. Second Life supports the Oculus development unit, although not the production product. (The production Oculus is locked down; only apps from Facebook's store or with Facebook-issued "Oculus keys" will run.)

[Tepix]

Second Life was somewhat successful for a while.

VR will give these virtual worlds a lot more appeal. As will the increase of bandwidth and improved graphics. There's a reason that two of the Linden Labs guys (the company behind Second life) are (separately) working on successors.