I know there are plenty of blogs out there talking about the OR, but I thought I'd share my experience so far and how it is relevant to space games.
I ordered my rift in April, with an estimated ship date of may, and got it three days ago. Drove me crazy! Anyway, one of the first things I tried was a Macross flight sim (I am a HUGE Macross fan). The interface of a real sci-fi fighter faces some of the same issues as VR ones. Hud elements need to be focused at infinity, or else they don't line up with objects in the real world. My targeting brackets seemed to be about 30 feet in front of me. Also, the current dev version is quite low res, so in flight sims when it is critical to locate and identify tiny objects long distances away, it falters. This isn't an issue since the consumer version will be higher resolution, but the current Dev kit doesn't lend its self well to flight sims because of that.
On the flip side though, I discovered while playing War Thunder that while dog fighting is harder, your situational awareness is vastly improved. Having a sens of scale, distance and speed meant I could come swooping in, air break with a flair and land on a carrier like some sort of hot shot. Let us not forget that the OR has the best head tracking I've seen, ever. And I've used military grade simulators. It puts my TrackIR to shame. It doesn't get confused, it just obeys in mere milliseconds. Every once in a while it can start getting off set (your head's natural 'forward' is not the same as looking forward in the sim), but with my view tied to my mouse too (I was flying with joystick and throttle), I could quickly correct this without issue.
Overall, for anyone who hasn't tried it, you just can't understand. I've used VR systems before, and I've been imagining what OR is like since I first read about it, but nothing was quite on the mark. It will change you, or at least change your opinions about PC gaming. I'm 100% convinced this is the future. I'm no longer saving up to replace my three 22" screens with 23" 3D screens. I'm going to spend 1/5th the cash on a smaller screen that straps to my face and fills my field of vision.