Unless that this severed head technology is fairly new, one would think that a game like Toribash would be a little more advanced, with more computing power behind it. Actually, I would imagine that it would be like Mortal Kombat 9 in the sense of broken bones and ruptured organs being taken into effect.
If we managed to make this game a reality, I would take it up again, as it would add an entirely new level of difficulty to moving your character.