DK2 Owner here.
Speaking to the immersion of VR -> It's amazing. Even noting the poor/grainy resolution, I've never experienced anything as immersive. I would argue that more it comes from the sensory deprivation than necessarily sharing the POV with your character. If you put on good headphones and the goggles, nothing exists outside of your experience. It's this that makes me believe it could cross from enthusiasts to mainstream. It just needs the plug and play ability.
Everyone I've shown it too has been so enamored with it. While that may seem to bolster the idea it's a gimmick, those same people have come back time again to want to use it.