Education relies on government funding, and usually comes in low on everyone's priorities... As I mentioned elsewhere on the forums, 40 years ago I already saw them cut back. Instead of Apples schools had to start buying the Franklin Ace (][e clone).
But the shopping example is one that I think is the killer app for VR/AR/MR ... just not yet.
You're on the right track... but consider for a moment the other thing that made iPhone's ecosystem... it was purposely anchored to iTunes Music Store. iTMS had a compelling use case: convenience. Around 2000-2001, Apple quietly licensed the one-click purchasing patent from Amazon. This is the key to what built Apple's comeback.
The next frontier would be no-click purchasing. Imagine being able to look at a person's jacket, a sofa in a friend's house or a car on the road, and say "I want that" and your MR glasses locate the closest merchant, set up the order, and submit your sizing, color/model preferences, and shipping information all at the snap of your finger.
Forget a 3D re-rendering of the item... Anything you can see you can buy.
That's the holy grail. That's a trillions and trillions and trillions of dollars sized market.
But it's about 50 years away both in terms of the AI, the chipset, the battery size and the form factor: the camera, the display, the sensors, the CPU/GPU all sandwiched into normal optical lenses that can be fitted to any ordinary eyeglass frame.
The company that makes this product will dethrone Amazon.