Disclaimer: I know the owner of this company.

Taqtile's Manifest [0] product does something like this. There are some videos of it here [1] [2]. It's not exactly what you describe w.r.t diagnostics, but instead it's used to speed up training of mechanics/mechanic-like tasks. It uses Microsoft's hololens, so a bit bulkier than these glasses, but it's a cool look into what kinds of tools some of these jobs might have 10-20 years from now.

[0]: https://taqtile.com/manifest/ [1]: https://www.youtube.com/watch?v=G1xNd_n1QyE [2]: https://www.youtube.com/watch?v=CxoczR8-mwU