Ive been looking at the idea of VR, and thinking about the controls in more detail, the suit would really only need hands and feet, to control driving, shooting or secondary weapons. They would work via some kind of motion sensor, and this would affect anything that the projected limb collided with, also rendering them in 3d, visible to the player, through their visor. The visor would change direction of view according to head movement, and relay sound to the player via a headset.