posted by justincredibleConsidering how easily they can track the path of a baseball in all MLB parks, I'm surprised they haven't figured this out yet.
The baseballs are being tracked by a special camera. Fixed location and can look for specific things. Similar to the shottracer in golf.
NFL is tough cause of the moving First Down yard. Now, goallines could be used fairly easily, but the speed of which relaying a crossing would need ironed out. It would definitely solve the plays where they can't see the ball line on a first a goal halfback dive and shit.