It would be super cool in my opinion to play in an S.A.O like this where you move your whole body and everything. It would just be scary if it become a matter of life and death when you loose all your health though. It's a great series!
I have to say I've been an avid gamer of RPG's since its birth as a D&D (pen/paper) to its current form and the idea is quite compelling and alluring S.A.O to me is a fantastic show. I would have been a beater for sure.