Wouldn't your have to apply a force to your front to simulate braking? When you accelerate in a decent car you feel the force in your back, and when you brake the seatbelt pushes into your front.

Not long till we're wearing full body versions of this with incorporated stereo monitors and earphones.

On sort of treadmills that move as we walk/run to keep us still, but move around a room to simulate acceleration etc.

Only technology left to invent is to make the suit resist your motion, so you can feel the elements in the came, like your rifle.

Wait, I'm having a heart attack, I can feel pressure all around my chest..

Phew, I'm not really, I was just accellerating.