This is a bit of a WTF.

I don't think Facebook would necessarily "ruin" Occulus (although it likely will) but I don't really see the fit. Courtside seats at basketball games -- OK totally doable technically speaking, but the hard part would be licensing.

If VR ever takes off in the mainstream it will probably end up becoming a "FRAND" kind of deal, where a bunch of key players pool their patents. Occulus will be a player, but hardly the only player.

I could see Sony or Microsoft wanting to sew up Occulus (although I think it would be a mistake to sell to either). Facebook just doesn't make much sense. Maybe it's just Zuckerberg really likes the technology.