Interesting points from everyone. I'm not sure pinball will survive indefinitely. Entertainment changes. Folks don't like the same games they liked 100 years ago for the most part.
I see big differences in what my kids like to play and what I liked to play as a kid - and I wasn't even interested in pinball back then. The video games they're playing are easier than what I played, but they're also more immersive and allow for much more creativity and customization. Saying that pinball rules are too complex for today's kids doesn't fly. Mine know every ridiculous combination of elements in Minecraft, not to mention all the Minecraft clones. They don't get confused, they love learning the intricacies, just like kids did with pinball thirty years ago. Minecraft costs a couple dollars and they can play it for weeks. It's a no brainer.