It's gonna be huge when someone nails it. Huge for work. Huge for home. The next Smartphone revolution; Smartphones took the Internet from a place you physically go (a desktop computer, or a laptop that's not terribly portable and that nobody's gonna carry all the time) to something that could follow you around. It put the Internet everywhere—not like water on tap, but like air.

AR glasses are going to mean the Internet's not just available everywhere, but is available on the real world, all the time, which is a pretty big distinction, about as big as the smartphone revolution.

A bunch of stuff that's kinda sucked will suddenly be great. AR tools. AR games. QR codes. Questions we used to have to ask our phones will simply be answered, automatically ("what's this song I'm hearing?", "who's that person?"). Voice assistants will become far more useful (get used to hearing a lot more people in public talking to their assistant—it'll be weird or seem dickish and annoying at first, but then, so did texting in public or talking on the phone in public, until, in a very short span, they didn't anymore)

Of course, we'll see if Apple's the one who finally cracks it. Someone's going to, I'm pretty sure, and I think all the major tech companies agree—they've all been pouring money into AR R&D for years and years, even though it's been clear the whole time that, on a phone or table or gaming device (Nintendo DS) it's got terrible UX, and there's no fixing that without new hardware. They must all believe wearables are going to be A Thing before too long.