We have the 15" flat screen TVs mounted on the walls on brackets that allow them to swing and tilt in each of our staterooms, and one big, flat TV in our common area. For now, we just have the satellite connected in the common room and the master stateroom. As soon as I swap over to Direct TV, I have a power splitter that will allow up to 8 receivers to run off of one dish. I can't find such a power splitter for Dish Network. And I only want ONE dish to contend with. Interestingly, we don't get a lot of TV watchers here. Most of my guests just want to catch the news and weather periodically.
Something we're going to add is a DVD player that stores all of our movies and then the guests can pick from the library what they want to play in their rooms via a remote control. It will be networked throughout the boat. It sort of reminds me of an Ipod - you just scroll through the menus until you find the movie you want to watch and click "play."