My 1.5 and 2.5 year old kids are both well acquainted with "Sprout" Channel, a preschool channel, and have been for over a year.
Not only do they know what they are seeing on the TV, regularly talking about various stars of the channel, such as Nina and Star, but the 1.5 y/o can even ask for the channel by name "I want sprout", and the 2.5 y/o can additionally even work the remote to get it, and say the numbers "1","1","9" as he's pushing them. Finally, my 1.5 y/o is already addicted to books and will page through them when there is a commercial or something she's not interested in.
They both learn a ton watching sprout. My 1.5y/o does dances and things that she sees, as well as says things I know she never learned from us.
We also have a large selection of YouTube playlists of childrens songs, age appropriate cartoons, and slightly non-age appropriate cartoons like 1940's vintage Micky Mouse cartoons. Again, they both ask for the playlist they want "I want Micky", "I want Dragon", "I want Caillou", etc.
Kids learn by observing the world around them. When I was a kid, I was watching my parents work a cattle ranch. My kids are often stuck in the house for five or six hours at a time, because I don't have a cattle ranch. They've explored every room, cabinet, jar, and canister that they have access too, and their huge collection of books hold no mysteries for them. You can only sit and try to read for so long, before you're sick of it for awhile, and they know all the pictures and can correctly tell you every animal, vegetable, vehicle, and geographical feature those books contain. What they see on the TV and computer supplements their learning opportunities.
Based on my experiences, I have to call bullshit on this politically correct article, and those like it.