Will try and find a link, but HBO Real Sports did a feature a few years back where a former player was advocating/demonstrating for a automated system where it would notify the umpire behind the plate on whether it was a ball vs. strike. This was demonstrated at several minor league games - digital zone which turned a light in Center red for a strike. There was no lag in the call - and if you didn't know what was going, would not have noticed. In the same segment, based on his analysis from one year of MLB, the correct call % was somewhere near 75%. As a life long MLB Fan, someone who played ball through college, coached high level youth travel ball, and now has a HS son with D1 aspirations - if we can make the game "accurate" I fail to see why wouldn't at the highest level.