Talk to an architect. (The kind that designs buildings, not software.) Last I knew a decade ago there were already early adopters from that field making daily professional use of VR. Mostly for showing clients the concept, I believe.
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But I've heard and seen so little use in any industries. I would have thought at a minimum that having access to hands-free information retrieval (e.g. blueprints, instructions, notes, etc), video chat and calls for point-of-view sharing, etc would be quite useful for a number of industries. There do seem to be interesting pilot trials involving Hololens in US defense (IVAS) as well as healthcare telemonitoring in Serbia.
Do you know of any relevant examples or use cases, or are you a user yourself? What do you think are the hurdles - actual usefulness, display quality, cost, something else?