We didn't have a TV when ours were little; in fact we had no screens at all. I really think that for our family, this was one of the best things we did. We had never really had TV before having children either, so this wasn't something we decided to do; it was just continuing with our normal lives.
I feel that it meant we did more with them when they were tiny, but they also learned to amuse themselves; not having the screens eliminated the bargaining and negotiating, which I think turns TV into a desirable treat; our children all figured out other ways to sozzle when they were worn out which didn't make them grumpy (as I think TV often does); they learned to read early; they all play instruments; I could easily go on and on, but I probably am already being annoying.
As they grew up, we acquired computers, and they have watched plenty of TV over the years, but it has never become a habit to have the TV on, more something they do when they want to watch a particular show.
I think that children who don't have constant entertainment available figure out more fun and creative things to do when they are a bit bored. There is so much instant gratification in our culture that some children don't get used to making a sustained effort; screens are a big part of that, IMO.
Also, I am (selfishly) annoyed by the sound of TV, especially children's shows, and wouldn't have wanted it around-