Without even considering positional head tracking, just the act of rotating your head moves the location of your eyeballs in space (our eyes are not the center of rotation of our head, our neck is).
So I'm also doubtful that this will end up looking any better than a simple 3d QuickTime VR sphere.
Having viewed one of these mono 360 clips on an Occulus I would say it's a significant step up from watching it on a monitor. However you're right that a truly compelling experience will require full 3D reconstruction of the environment so you can render both eyes in realtime with head tracking.
That's probably feasible for some types of simple scenes but probably not a nature documentary.
