all cars should have head up display that would be fun and its shows speed G forces and other stuff so it's beter when u race u only whach into the road so u can do beter laps. Sorry for my bad English
http://z.about.com/d/cars/1/0/d/O/sp_06z06_hu3.jpg
http://z.about.com/d/cars/1/0/d/O/sp_06z06_hu3.jpg