We were on the frontpage of HN a few months ago with a project called Oculus FPV[1]. Having stereoscopic vision helps immensely when judging the distance when flying fpv like this. And the immersion from a wide fov makes it very fun to fly. It was a cool prototype, and should be even more useful with the new generation of Rifts. Sadly, most stock fpv goggles only works as a screen taped in front of your nose.
Maybe Transporter3D will add support for DK2, then it will be as easy to set up as "normal" fpv gear. Edit: Seems like it has basic support at least.