I can't use the Oculus Rift (just as a display, it makes me motion sick "I keep thinking I can turn my head when I can't and it makes me really dizzy and my stomach starts acting up) I'm already to us...
I beleive every single one has headtracking. Not unless it's a "check it out I've managed to get it to work using vorpx+tridef+vireo+opentrack+shitloadsofcrap, no headtracking yet".