If it was more accurate with the location, then it could be good for automated offside? Possibly for try detection (but the ball with a transponder would be better)
But since most GPS is only accurate to a few meters (though with augmentation you can get centimeter accuracy) I can't really see the point! Except to tell teh Welsh team which way they are supposed to be heading on Saturday...
We're goin' down, I'm sure of it.
If you get an email telling you that you can catch Swine Flu from tinned pork then just delete it. It's Spam.