First, we're talking about interactive queues... like games in queues.
And this is interactive queues vs. new rides. It's not both because Disney isn't going to pay for both. I'd be okay if you created new rides with interactive and immersive queues, and if you turned all the other queues and made them immersive and interactive and enclosed them and added fast wifi and allowed you to take in food and had benches in line and had drinking fountains. But that doesn't seem all that plausible, does it?
I'm glad that you're for new rides, but you also should understand that when you build new rides, they add capacity. A heck of a lot of capacity. Believe it or not, the Magic Kingdom is less crowded now even though there are more people visiting... and that's thanks to New Fantasyland actually adding capacity to the park. Not because of the new interactive queues. However, New Fantasyland has a host of issues on its own.
Which brings me to the next point... Interactive queues are not always immersive. If you think that the Space Mountain Games constitute immersive theming, then the bar has fallen to a very low level. At least Big Thunder Mountain's new queue is immersive.
Most good queues aren't interactive... Wizarding World of Harry Potter has no interactive queues at all. In fact, I don't think most parks have interactive queues in their highest themed rides because if they're not done right, they detract from the show quality.
And if you think Universal's lines are shorter than Disney's, well, not so much. They're just as long. But Universal is building new attractions and even lands that have nice and immersive themed queues and they also have a free cool mobile game and they are rolling out wifi in the park soon. I don't know why you believe a comparison to Universal is silly, but it's not.
Apple IDs are easy to create, you don't need a credit card to create one. And even if you did, I'm willing to bet your kids are smart enough that they know how to take a picture of your credit card the next time you pay for dinner. Seriously, if you're thinking you can outsmart your own children with technology, you're a pretty out-of-touch parent.
And seriously, battery life? You're taking that argument? They sell battery packs for a reason my friend. And if you bring your charger to the park, they even have charging stations in the Magic Kingdom now, and more are on the way. Just FYI. Plus, this is something that will get better over time anyway.
Not to mention, everyone who wants one will have a smartphone later on too. That's just a fact of life.
And one last thing, and this will probably hit close to home, so please, I'm not trying to offend you, I'm simply trying to have a healthy debate.
Your family dynamic that you speak of doesn't exist for an entire family's vacation in any theme park I've seen. Sure, it exists for a while, but when you force your kids to talk to you and have "quality family time" for a week long vacation, it gets extremely stressful at some point, especially if you have teenage girls. Wifi and apps will help ease those situations, providing a doorway to the rest of the world. I'd also argue that interactive games in the Space Mountain Queue really don't bring a family together. It's just a bunch of giant multiplayer games. So, to recap, I love the way you're thinking on keeping families together on vacation, but I really don't think that's sustainable.
Also, an Air Conditioned family will keep a family much happier as well.