TV is a horrible horrible thing which should be banned entirely. Video media in general is something that should generally be avoided until middleschool or highschool after some discipline of critical thinking has been established.
I am not saying that there should be no videos for kids. I have a 2 very young children, and I will freely admit that sometimes you just need a nap, or to get the dishes done, and sometimes a show or movie is the only thing you can trust to keep the kid's attention long enough for you to accomplish something without being bothered. But this should be the exception to the rule rather than the rule itself.
But computer use is something else entirely. While TV (and video media in general) is by its very nature a passive medium which teaches people to accept what is presented to them, almost everything on a computer is interactive and at the very least teaches cause and effect relationships. Most things on a computer are allegorical or abstracted, which teaches kids critical thinking even from a young age. I had the good fortune of having a dad who worked in the tech industry when I was young, and was literally the only one of my high school class to have (and use) a computer before I went to school. Granted I am not the sort of person who is motivated enough to monetize my good fortune, but it has helped me to not fall into most of the same traps that my peers have fallen into. It taught me that I am in control of what I want to be exposed to, and that if I want a better life then I can expose my mind to those things which are helpful to following that path. Using computers as something other than a media consumption device makes people independent free thinkers who are slaves to nobody except for their own shortcomings.
The big issue that we are having today though is that my generation which was brought up on TV now has a bunch of kids who are starting to use computers... but my generation is teaching the next generation to use computers as a purely media consumption device rather than the tool that it can be! And this is horribly sad! There are awesome kid's games, tools, and programs that can teach programming. The rise of the maker movement has brought so many great tools which could be used by schools and families to educate children to learn and discover the world around them and how it all works... but instead we are training up yet another generation of passive users who will mostly amount to nothing for lack of vision, parenting, and competent teachers.
But I guess that is the point after all. When you are an incompetent parent (and we all start out that way) then it is easy to assume that those on TV who have 'made it' in life would be much better teachers than yourself. I just hope that those who read this have the courage to make mistakes while parenting rather than making the mistake of differing parenting to someone or something else.