Imagine putting a floating PDF in the air next to the pile of parts and you get 90% of the experience for 10% of the dev effort. That's what Apple is clearly focused on. Making your regular computer use functional while wearing techno googly eyes. That's Apple's killer app. AR is not going to get a lot of those experience investments because it makes no monetary sense. It's a massive money and time sink for a very fickle audience. Disney announced exactly what you're asking for, but it's crystal clear that we'll get something like four things a year. Maybe next season of Captain America gets a cool interactive border when looking at it. You can put Disney World on your kitchen table.

No one will care and studios are going to explore this field until they converge on a cheap but good enough standard to enhance their regular content. Maybe it will be a projection of the color palette of the scene outside the viewport. Maybe they will scan the surroundings of the scene and project it. But I'm pretty sure they'll just tout the quality of the 3D experience and that'll be good enough.