I have an Oculus Rift working with X-Plane 10 through FlyInside.
I'm having some motion smoothness issues, but I think that may be related to the age of my i7 processor.
I also have a Leap Motion sensor working. It is very cool to see your hands inside the cockpit, BUT... I've not been too successful actuating any controls with them. I can see where the controls are sometimes detected, but grabbing and manipulating is elusive.
I suspect some of that is how the controls were set up by the plane maker.
Really good potential with all of it.
Leap Motion's demo programs are pretty good, so you can see what is possible when something is geared for it. There is no reason why controls could not be handled in a cockpit that way.
I too am looking forward to XP-11 supporting Rift and Leap Motion.
Side note: As a test, I tried DCS World. I like the rendering of the graphics and motion is smoother, though it can get bogged down too when too much is going on. No Leap Motion support, so no comment on that for DCS World.