I'm not sure how good or bad reading will be with AR headsets. The last time I tried out a Quest 2 I was incredibly disappointed because everything looked very blurry to me, more than usual when I'm not wearing glasses. The text was almost unreadable. Though to be fair, it was a shared unit, and I probably didn't adapt it too well to my eyes. Tried out some HoloLens too, though I had an incredibly brief time so I didn't do much with them, didn't even get to wear them comfortably.
As long as the "screen" is nice and clear, I can see the potential in it. Hell, "unlimited" "monitors"? Sign me up! Seriously, being able to place windows around me would be incredibly convenient, and I've been saying that we should be able to use physical keyboards in AR for ages!
I don't think I'd be the type of customer that would take it around, no surprises there if you check the comment that I wrote in the internet addiction thread, but I think it'd be great for domestic or work use in the office. I wouldn't do much with it by itself, so I wouldn't mind a unit with less power, since I'd always use it as an extension to my computer. Who knows? Perhaps the future of desktop computing is spatial. Note that I said desktop and not portable. Just... don't wear it when you're out there with your buddies, or when you're a bit bored, and please, don't be stupid like that one guy who drove with the headset on.
TLDR: the potential is there, but I see it more as a computer based accessory rather than some sort of "next iphone"