One of the worst things that can happen in sports is when the OFFICIAL makes an error that impacts the outcome of a game. Hence, the electronic calling of balls and strikes is long overdue.
To the person who opined above that the strike zone is three-dimensional, while that may be theoretically true, no human set of eyes can accurately judge that ball placement. I prefer a two-dimensional strike zone, known and agreed by all, with an electronic sensor detecting strikes and non-strikes.
Furthermore, I would say that the strike zone itself should be standardized. It is not possible to accurately place the top of the strike zone per the rule book ("the area over home plate from the midpoint between a batter's shoulders and the top of the uniform pants" ). And you can still have the Ricky Henderson phenomenon where the batter squats down when standing in at the plate. Bullshit. Make the strike zone 28" above home plate to 48" above home plate, and every batter will have to deal with it.
There is only one thing preventing this logical innovation - bullshit from the umpire's union.