There’s tons of complex jobs like this in the military, healthcare, high end niche manufacturing, etc.
There’s also the sales aspect where you help customers visualize products like a car demo to executives.
The barrier seems to be customization and staffing the implementation. You could generalize some things like certain specialized surgeries and create platforms across other fields. But most might require a mix of 3d, coders, and designers/art directors.
So we could see the equivalent of video production studios or web design shops for AR. Then these same shops will find patterns and develop products to generalize them.
Edit: For example, Daqri was one (but far from the only) AR companies that thought B2B was the way. They went out of business in 2019. https://techcrunch.com/2019/09/12/another-high-flying-heavil...
Not sure I’m willing to pay several thousand dollars for it though.
Not to mention, the vast majority of games try to pull you into their world, and make it seem large or even unending. AR directly works against both goals: you are integrating the game into familiar surroundings, and the game space becomes severely limited. Sure, there is some space for things like Pokemon Go or other "bring the magic/tech/? into your daily life", but this is a very limited setting.
From this point of view, I believe gaming with AR is never going to take off (though there could well be space for a handful of extremely popular games, like Minecraft or Pokemon Go), and VR is far more promising in this space. I also think that neither VR nor AR will make any serious impact unless and until some new control scheme is invented that can actually feel different than sitting in front of a screen (but with the screen hanging from your head).