Everyone who goes on a track day seems to need somewhere between one and 147 GoPros on their car to get every angle.
But now, track day junkies, you need to make a major investment. GoPro just released the super high def Hero3 Black. It looks awesome. And damn expensive.
Current GoPro cameras can record in 1080p, which is the highest resolution currently supported by mass market televisions. But the Hero3 Black can record at the insane new 4K standard, but will also slow resolution to 15 frames per second.