I can imagine that a car hire company , specialising in renting out high performance/high value cars could see this as a way of safeguarding their property : rent a Porsche , Ferrari or whatever and the owners will know how you treated the car , then , if you want to hire another time , they can base their decision on the evidence .
I could imagine insurers of 'accident prone' or convicted drivers stipulating fitment of one of these devices : in the event of a claim , they simply review your driving and , if deemed irresponsible , your claim could be kicked out - of course , you'd sign up agreeing to these terms & conditions in order to get insurance .
Big brother is just around the corner .....