This is upsetting because it means Facebook is building the software platform for the Oculus, not enthusiast developers or hundreds of independent startups. This has economic impact, and it's personally disappointing for anybody who gets excited about building VRUI.
And how many developers have found success dealing with the FB APIs and platform?
There's a reason people only integrate with FB to try and take traffic, and even then they become the customer paying for ads. It's not worth your time.
Or, yeah, angst.