The American Academy of Pediatrics released their TV viewing recommendations for children today. They continue to recommend little to no TV or screen time for children under age two. They state that video screen time provides no educational benefits to children under age two and that infants and toddlers need face to face interaction to learn and develop language skills. Check out this article for more information on the recommendations.
I think it would be interesting to also look at the impact of caregiver's screen time on children under age two. I would guess that children of parents who are busy checking emails, texting, tweeting, blogging, etc, are not getting as much face to face interaction or hearing as much language as children whose parents spend less time looking at screens.