I think that is basic the ghost rider. when you practise the pc save your best lap and shows the car while you are driving to compete with yourself. this would be quite good to prepare the config of the car to see in what aspects you have imporved the setting.

Another thing the G force. We can't feel the real Gforce but we can show it in the screen whit colors and bars and more and thats not only a decorative aspect but also is useful in the corners or in breaks. And it would be good that it saves the top Gforce or more data to improve setups (breaks, curves) or driving styles.
what do you thing? i knew a lot of games that include this kind of things so that is not new.

I've seen both at the addon section, dunno if they are compatible on Z though