It has this screenshot thing
According to Ars Technia it has this screenshot thing that lets you take massive or 360 (nod to VR) screenshots, if the developer supports this.
The thing is though the first thing anything worthy of calling itself an engine actually does is NOT render crap the user cannot see because of the camera position and angle. I can see it being very difficult to implement.
Having said that I still pretty much only play Halo Reach, and I've always enjoyed the theatre feature where you can go back and view the entire game from any angle you like, so perhaps I don't appreciate how important it might be?