Re: Computerizing the Refs
The GPS chip you are referring to isn't precise enough at this time. At least that's the last I heard of it, it's only accurate up to 3 to 10 feet, football needs it to be accurate to the millimeter to implement.
The reason why GPS is only accurate to a few feet is because the satellites are in space, miles above earth. I'm sure, if the NFL wanted to, they could design a GPS system for each stadium that would be significantly more accurate. Further, why does it have to be GPS? What if the ball was like emitting some kind of infrared light or something that could be picked up by a sensor at the goal line?
The easiest would be false start/netural zone infraction. If you had a camera set at the line of scrimmage, it could easily detect if someone is lined up in the neutral zone, or if someone jumps before the ball is snapped.
Put sensors in facemasks. Etc.
I really don't have much technical knowledge here, it just seems to me that with all the money available and how far technology has come, about half of the refs' job could be eliminated via computer.