The author seemed to have no trouble wearing it for so long, but I think it would be incredibly uncomfortable after a short while for the majority of users. Wearing my super-light eyeglasses all day every day is eventually uncomfortable for me. I looove taking my glasses off before bed, it’s such a relief, so I can’t imagine adding all that extra weight when I’ve got two perfectly functional monitors in front of me.
And I’m totally in favor of AR/VR/MR or whatever, it just has to be insanely light and comfortable if I’m expected to wear it for more than 30 minutes at a time.