I understand that it is a great habbit to read books, and it improves imagination but you cannot point a finger at another medium and say that the other is bad. Probably this was your interest and m not sure whether this is what your kids want. Looks like the opinion has been buried deep under over time.
Are you absolutely sure that they dont sneak off to watch what they want else where.
Please dont enforce the way you grew up on to kids of a different generation.
The key requirement for evolution is to maintain a written record of achievement. --ray kurzweil. First it was DNA, then written scripts, now possibly TV
Last but not the least... they say that a picture is worth a thousand words... and a moving picture.......any guesses??
