Mounting safety concerns have already rattled the NFL. Players traditionally deemed fit -- in terms of age and skill level -- continue to walk away from the game. Since the Zero1 is only now entering its first game, it remains to be seen if it's capable of drastically improving player safety and tidying up the NFL's tarnished image. Though it's unlikely the NFL dries up without the emergence of a company like Vicis, even a few star players walking away from the game is damning evidence of an eventual decline.