This is a great answer. I think you already hint at this but I wanted to elaborate on it a bit: the big thing that our kids fall in love with will not necessarily be computing (at least not in the sense that we mean), and that's okay.
We grew up at various stages of a massive revolution—some are reminiscing for the 80s, I'm at the tail end reminiscing for the early web and then the Flash era. Computers were wonderful to me because I could, as a kid, produce results that looked and felt like they were in the same ballpark as what I saw professionals doing. It was the frontier, and I felt like I was helping to explore it.
In the last two decades computing has grown up, and having grown up it's no longer possible for children to participate in the frontier. From a young age they interact primarily with toys and tools that would be impossible for any one of us to make alone, much less for a child who's still learning. Sandboxes like Scratch are great, but an adventurous kid who wants to be at the frontier will very quickly recognize it as just that: a sandbox. It's not as compelling because it's artificial, created specifically for their education.
Instead, I expect that my children will find something else, a new frontier to push. My kids don't want toys curated by their parents, they want to explore the world and they want to contribute. They are going to find the fields that are still fresh, that still have mystery, that don't require years of education to get to the point where they can contribute meaningfully. And that's awesome! I'm excited to see what they find, and excited for them to show me along.