All the attention of the "fan experience" reasons for the new Wrigley video boards has been overshadowing a concern: it helps the opponent.
The LF video board is in direct line to the visitor's dugout.
The manager, coaching staff and players have a clear view of the video replays, including the Cubs pitcher's pitches on strike outs. This is real time scouting information during a game.
During the Washington series, I observed the Nats looking at the video board after at bats. Seeing how a Cub pitcher's spin, bite and arm angle of that day's "out" pitches can lead to quicker adjustments for batters.
It is one thing to have a scout in the press box looking at the TV broadcast PitchTrack to relay information to the dugout. But it is another to have a player actually see the replay of the pitcher's game arsenal.
I doubt that the Cubs realized that a video board could be used in this manner by their opponents. The motivation for the new signage was revenue. New revenue.
