This is probably closer to the mark. We could replicate any aircraft in an AR field and hand Airman Timmy some AR gloves and let him start swapping drive trains, etc. Initial start up costs would be high, but it woudl be pretty darn good training. But, don't hold your breath, considering ours is an organization that has one part still trying to convince the other part that a natural sleep cycle is a good thing, and should be prioritized.
This was actually a project undertaken by the now defunct Chief of Naval Operations Rapid Innovation Cell (CRIC). Back in 2013, we were the first enterprise organization to get 2 pair of Google Glass for experimentation. We worked with a young and talented engineer at SPAWAR who built apps in his spare time.
Our experiments were two-fold:
1) Test them out on the bridge of a destroyer to put overlays on what they saw out at sea - think JHMCS light for SWOs.
2) Give them to maintainers to embed instructions as they were performing repair tasks
Both ran into the beast of IT...namely limited Wi-fi aboard ships, and concerns about networks.
On some of our tours with industry, some of the ship-builders were creating AR touchpoints on their future ship designs. Pretty interesting stuff.
But considering the Navy bureaucracy wanted to speend 250k and 9 months to qualify a $15,000 3D printer on a ship (which we got onboard anyway via a NAVSEA experiment), it's no wonder AR never went anywhere.