[jayd16]

I don't know. I would say the historic trend is computing becomes more and more ubiquitous. Truly ubiquitous computing would need an always available display and AR wearables seems like the solution there.

"Its too expensive right now" isn't really a damming argument, is it?

[wpietri]

The thing with trends is that they all end eventually. At the start of the automobile era, cars were quite slow, and they got faster over time. If we just draw out the dotted-line trend, we'd all be driving around at supersonic speeds.

It's true that computing has become more and more ubiquitous in recent decades. Will that continue? We'll see. Will it continue with VR and AR? Maybe, maybe not. Your approach to this is fine for asking "Is this SF short story plausible?" But it's not at all sufficient to justify billions of dollars in spending.