I am really having a hard time understanding what the big deal is with VR/AR/MR. Outside of gaming (which I think could be cool), and a few other niche areas what purpose does it serve?
Obviously I haven't really used it other than about 2 times with my Idol 4s, and a google cardboard thingy. What am I missing? TIA.
You are missing the whole point really. Right now, VR is good for everything BUT gaming which has still to mature and even figure out itself and what it is supposed to be like. For now most high profile games are more like "ports" than actual VR experiences.
VR today is all about sightseeing, training(simulations of all kinds, from military and aviation, to trains, boats, F1 racing, security, customer service, etc. etc. etc.) socializing online, architectural visualizations, ergonomics, virtual theme park rides, and so many more.
AR has plenty of medical applications, commercial too. From previewing furniture, make up, clothes, and decoration for your own home or car, to evaluating medical conditions.