

It’s not clear to me whether-or-not the display is fundamentally different from past versions, but if not, it’s a relatively-low-resolution display on one eye (600x600). That’s not really something you’d use as a general monitor replacement.
The problem is really that what they have to do is come up with software that makes the user want to glance at something frequently (or maybe unobtrusively) enough that they don’t want to have their phone out.
A phone has a generally-more-capable input system, more battery, a display that is for most-purposes superior, and doesn’t require being on your face all the time you use it.
I’m not saying that there aren’t applications. But to me, most applications look like smartwatch things, and smartwatches haven’t really taken the world by storm. Just not enough benefit to having a second computing device strapped onto you when you’re already carrying a phone.
Say someone messages multiple people a lot and can’t afford to have sound playing and they need to be moving around, so can’t have their phone on a desk in front of them with the display visible or something, so that they can get a visual indicator of an incoming message and who it’s from. That could provide some utility, but I think that for the vast majority of people, it’s just not enough of a use case to warrant wearing the thing if you’ve already got a smartphone.
My guess is that the reason that you’d use something like this specific product, which has a camera on the thing and limited (compared to, say, XREAL’s options) display capabilities, so isn’t really geared up for AR applications where you’re overlaying data all over everything you see, is to try to pull up a small amount of information about whoever you’re looking at, like doing facial recognition to remember (avoid a bit of social awkwardness) or obtain someone’s name. Maybe there are people for whom that’s worthwhile, but the market just seems pretty limited to me for that.
I think that maybe there’s a world where we want to have more battery power and/or compute capability with us than an all-in-one smartphone will handle, and so we separate display and input devices and have some sort of wireless commmunication between them. This product has already been split into two components, a wristband and glasses. In theory, you could have a belt-mounted, purse-contained, or backpack-contained computer with a separate display and input device, which could provide for more-capable systems without needing to be holding a heavy system up. I’m willing to believe that the “multi-component wearable computer” could be a thing. We’re already there to a limited degree with Bluetooth headsets/earpieces. But I don’t really think that we’re at that world more-broadly.
For any product, I just have to ask — what’s the benefit it provides me with? What is the use case? Who wants to use it?
If you get one, it’s $800. It provides you with a different input mechanism than a smartphone, which might be useful for certain applications, though I think is less-generally useful. It provides you with a (low-resolution, monocular, unless this generation has changed) HUD that’s always visible, which a user may be able to check more-discretely than a smartphone. It has a camera always out. For it to make sense as a product, I think that there has to be some pretty clear, compelling application that leverages those characteristics.
I mean, I’m listing it because I believe that it’s something that has some value that could be done with the information. But it’s a “are the benefits worth the costs” thing? let’s say that you need to pay $800 and wear a specific set of glasses everywhere. Gotta maintain a charge on them. And while they’re maybe discrete compared to a smartphone, I assume that people in a role where they’re prominent (diplomacy, business deal-cutting, etc) probably know what they look like and do, so I imagine that any relationship-building that might come from showing that you can remember someone’s name and personal details (“how are Margaret and the kids?”) would likely be somewhat undermined if they know that you’re walking around with the equivalent of your Rolodex in front of your eyeballs. Plus, some people might not like others running around with recording gear (especially in some of the roles listed).
I’m sure that there are a nonzero number of people who would wear them, but I’m hesitant to believe that as they exist today, they’d be a major success.
I think that some of the people who are building some of these things grew up with Snow Crash and it was an influence on them. Google went out and made Google Earth; Snow Crash had a piece of software called Earth that did more-or-less the same thing (albeit with more layers and data sources than Google Earth does today). Snow Crash had the Metaverse with VR goggles and such; Zuckerberg very badly wanted to make it real, and made a VR world and VR hardware and called it the Metaverse. Snow Crash predicts people wearing augmented reality gear, but also talks about some of the social issues inherent with doing so; it didn’t expect everyone to start running around with them:
I think that Stephenson probably did a reasonable job there of highlighting some of the likely social issues that come with having wearable computers with always-active sensors running.