Growing up with computers as a new thing that most adults didn't understand, the majority of people who understood them were children. I also thought that as computers were everywhere, children after me would all understand them, but that didn't happen.
With ubiquitous computing, the ratio of children who understand to children who don't is a little higher than when I grew up, but not that much. Clearly, some children grew up with me who were willing didn't get the skills because they had no access, but lots of kids are either need directed instruction to attain technical literacy, or are unwilling or incapable of attaining it.
