Was flying more fun before in-flight movies?
http://edition.cnn.com/travel/article/in-flight-entertainment-before-movies/index.html
Now that those who want to see their favorite movies prepare tablet computers and download them before boarding to enjoy movies during flight, inflight movies will no longer be necessary.
So, except for displaying current plane location, TV screen on back of each seat will be meaningless.
Furthermore, after expansion of the internet use, flight location system will also be meaningless.
Then, electrical outlets will be needed rather than TV screen.