I don't know about anyone else, but this worries me. I do not think this is a good thing. I didn't get a cell phone till I started driving, I think we're in big troubl if more 4 yr old can use a tablet better than they can tie their shoes.
Zero to Eight: Children's Media Use in America 2013
Although adoption is slow (for instance, only 15% of teachers find value in Facebook, Wiki, and other social networks), time will only show that it will rise. Interestingly though, about one third of teachers surveyed for this infographic say they use social networking or social media for their instruction.