Changing COG Dynamically

[69CSTranger]

So I have been thinking about this for a while.

Some test aircraft have large water tanks built into the aircraft and pump water between them to simulate rapid changes in the aircrafts COG, such as cargo shifting or people moving about the aircraft.

What if a vehicle could change their COG in relation to movement?

I imagine a box mounted in the bed of our trucks with 200-500lbs. of ballast and the box would move on two axis inside the bed on a frame bolted to the bed. The box would be attached to accelerometer, similar to what is in your iPhone, and controlled by a computer.

The box would move to the right on a right hand turn, and move to the rear right, on a right turn involving braking, etc. When you brake hard in a straight line the box moves to the rear of the truck.

What do our resident track and suspension gurus think?