No, they could have made a sizable investment without having a controlling stake in it. No, they Acquired it. You don't do that unless you want to change something there. My best hope is that the Zuck sees something cool going on with the Oculus and wants to try his hand at something new. My worst fear is that they will develop the 'Oculus API' as a wrapper around the original API and Facebook. Now Facebook can ad ads featuring your friend's faces in games... and free 3d games if you just watch a 15 second ad for every five minutes that you play...