I'm thinking my kids won't use any tech until they can read. What good does it do them otherwise, anyway? As a toy for a few minutes, perhaps. I think people use tv/ipad/etc as a way to avoid having to interact with their kids for long periods of time. That's how it works for a lot of people I know.

Time spent on an iPad by a 2-4 year old is time spent not learning more important things.