I suppose in time you'd adapt to it all too, but i still wonder whether theres a benefit (beyond immersion) to VR, likewise if it might hinder.
Nail/head. I don't think there is anything beyond immersion- immersion is the key raison d'etre of VR.
I bought a G27 wheel to play GT5 on my PS3, not because it made the game easier, in fact I always found it 1000% easier with a gamepad, but because it made driving far more immersive.
I read a review of Alien Isolation using Oculus, and the reviewer said he didn't like looking down at the tracker in the game because it exposed the back of his neck to an environment where an Alien was stalking him. Now that's immersion, and the reason why I want my Oculus.