I believe I mentioned this elsewhere already. Hope someone can. Seeing as it can do a complete vehicle health report, is should already be tied into the entire system and ODBII. Only needs a nice GUI made to display it.
On my old 7" Pioneer Z3 sat/navigation system I had in my R32, they had a g-force 3 gauge screen option that was good to use at AutoX events. Sure hope one could be made for our systems, along with a boost gauge!