>now that Facebook has gotten their creepy hands on it
No Oculus headsets shipped to consumers until after the acquisition by Facebook. The DK1 from the Kickstarter started shipping a few days after the acquisition.
>I wonder if Linux is a fundamentally much better platform for VR than windows?
The most popular OS for VR is the one running on the Quest headsets and uses Linux. For quickly evolving technology like VR I believe Linux is a better fit, but in the long run I don't think it's a fundamentally better base.
>The problems are mostly latency related, right?
Latency isn't a big issue with VR due to reprojection and latency is important for normal games too. The amount of people on Windows who want lower latency for FPS games far outnumber the people who want low latency for VR. For VR you are likely just talking to the graphics driver and can bypass the operating systems compositer with your own.