Interesting... Is this a play against Google Glass ? I'm not sure how Facebook could benefit from Oculus VR unless they're starting a completely unrelated business (never mind what Zuckerberg says in the post).
It seems like it would be an odd play against glass, because of the differences of VR vs AR. With VR you're in another world, and that doesn't seem like facebook's goal, which would be to add facebook information with the rest of the world. So it seems unlikely unless they're planning to completely overhaul the project and make it AR instead of VR.