I am shattered right now. I was SO happy for Oculus VR, I wanted it to become big, I wanted it to become something truly special.
You might be a bit premature with that comment. Mark Zuckerberg is not an idiot. He's probably smart enough to realise that Oculus need to truly remain independent for real innovation to continue.
This is probably a long-term bet on VR tech by Facebook, that they know would be too expensive to do in another 3-5 years. My bet: this is not going to kill Oculus, rather the opposite.