Forgive my ignorance if this had already been confirmed/answered, but I just wanted to ask again for my sake (and everyone else that's probably wondering the same). 
I've been thinking about buying a VR headset, and considering Oculus' DK2 is sold out at the moment, I've found a great alternative, the OSVR. In the past stream with Braben's Q&A, he mentioned that he'd been playing on the Vive for the demos he showed, and slightly touched on the subject of OSVR compatibility, albeit rather vague.
So, my question is, is there any sort of universal compatibility for VR headsets, including the OSVR, or is it specifically for Oculus?
I've been thinking about buying a VR headset, and considering Oculus' DK2 is sold out at the moment, I've found a great alternative, the OSVR. In the past stream with Braben's Q&A, he mentioned that he'd been playing on the Vive for the demos he showed, and slightly touched on the subject of OSVR compatibility, albeit rather vague.
So, my question is, is there any sort of universal compatibility for VR headsets, including the OSVR, or is it specifically for Oculus?