As Snoozeman said: "Almost all new ships on Princess, Royal Caribbean, Carnival, and NCL have the "Jumbo-tron" type screens. Some are around the pool area and others are in the atrium area (NCL). I personally dislike them. They are usually nothing but noise makers. They are fine for the evening movie but most of the time people sit through about 1/2 of the movie or fall asleep.
I do like it when they show a major event on them such as a major football, baseball, soccer, etc.. Not a fan of cruise line commercials and rock videos.