Broadly speaking, given a choice between getting on an airplane and traveling a few thousand miles versus strapping a headset on your face, there are plenty of scenarios where one can make a compelling case for doing the latter, even with today's hardware. Meetings, presentations, training, and more. The hardware is a big barrier currently, for sure; expensive and clunky. But that will change pretty quickly. The ability to showcase something without physically being there is very valuable. And yes, naturally, a lot more applications will emerge once the technology becomes easier to digest.
Training maybe. But humans are too much social animals for meetings (we already have setups with HD tvs, cameras, and high bandwidth connections and still fly to and from, almost as if being able to do so, or demand that they come to you, is a show of force and status) and presentations (never underestimate the value of the mingling that happens before, during and after a presentation) to happen remotely, unless we are talking some kind of sci-fi holographics.
