Internet has drastically reduced the TV viewing population.
Here is the evidence to support this fact. About 30% of the Internet users are now watching videos and shows online. Netflix, YouTube, Hulu and Tudou are the highly viewed video sources on the net.
Videos lined up on the web are of educational value too. For instance, Khan Academy has about 3000 videos instructing on various topics in Math, History and Physics.
But about 83% of students end up watching entertainment videos as against education. Only about 42% of Americans feel TV is necessary.