It's about time. I hear some of the old schoolers say let they umps make the call because they are "part of the game" and I LOL @ that every time. They finally have made a change to catch up with football on plays that can be replayed.
And they are the last of the 4 sports to make this change. Football tinkered with replay in the late 80s or early 90s and it was a mess and they finally came up with a good system and keep tweeking it. NHL started replaying goals a while back and the NBA reviews 3 pointers and technichals.
Baseball added the home run replay I believe a couple of years ago and they now have a replay system that will be voted on and
I can't see why it wouldn't pass. I don't think balls and strikes will be included and if they are then they should just completely eliminate the umpire. More or less I think it will be mostly for baserunning and home runs and catches and things along those lines.
Here is the writeup from CBS
http://www.cbssports.com/mlb/blog/ey...-replay-system