I couldn't access the whole article because of the slowness of my internet connection, but I have a contrasting opinion to the above. I worked in pediatrics for about 5 years in the 70s and 80s. There was plenty of TV then that kids watched, and even then I had concerns. (I now work with patients of all ages, including some kids, and there is a TV in every room).
In the home, parents can moderate what kids watch, but this doesn't always happen in the hospital. What brought this home to me was walking into a multibed room one evening, many years ago, and finding a 9 year old girl with a terminal brain tumor watching a show about people being buried alive. (I turned it off.) When I had my last baby I was able to get MTV on my TV in the hospital room, and (call me conservative) was appalled. Not for kids! Some of the talks shows, and soaps also, have content which really isn't so good for all kids.
A big enough hospital should have a Child Life department and this should be considered a priority. Kids who are hospitalized over long periods and who don't have a lot of normal interactions are missing out on important aspects of development. Even if there isn't a Child Life department, there should be age appropriate resources provided by the hospital, including toys for infants. Even in this electronic age, many children like to color, listen to audiotapes, play with puzzles, play with dolls, cut pictures out of magazines, etc. None of this requires a lot of nursing time. Older children can read books, magazines (think Dirt Wheels, etc. for teens), and do their homework (!), if the stay is long enough.
TV is fine in moderation, but I don't think anyone would suggest that it really promotes children's developmental needs. It may quiet a child, but it does not really promote interaction with others or growth and development, (except possibly for some programs designed for that purpose). Also the TV being on may allow us to ignore the concerns and fears that children might really need to talk about.
If you are going to use TV in a hospital, it shouldn't be on all day, and the programming should be appropriate for children.