You forgot "solution in search of a problem", "people running into things", "99% don't want", and all variations of nobody will be wanting to wear these 24/7/365 (as if anyone actually would).
Now did anyone notice the confirming line about using these as a Mac monitor which, even if it is "not as advanced as desired," implies that these can be the monitor of any-size discussed in prior threads. How much would we pay for an Apple 32" monitor that can easily move around with us and be used even in cramped quarters like on long airplane flights? How much would we pay for even a 17" MB? 18"? 20"? 24?" How much would we pay for iMac 27"? 30"? 32"? Ultra-wide? How much would we like a MB or iMac that is 40"? 50"? But also laptop bag light and mobile?
Thinking of that
one simple application can make $3K seem only $1K more than the ASD (with stand option), which very likely sits in a fixed location for the life of the device... and substantially less expensive than Apple's other monitor... though this one may be able to be much larger/wider than that one... and go-anywhere-with-us mobile. Or have 2 of those visible in Goggles. Or 4 of them. Etc.
Look at that specific reference to iPhone allegedly from Apple. While many Apple competitors are trying to figure out an optimal folding screen technology to deliver much more screen RE in a still small, mobile device, what if Apple decided to take a crack at an any-size phone screen in a small, mobile device? Any size iPad screen? No crease or hinge necessary. Let's face it: we all must sometimes be doing something on our iDevices where we wish we could dynamically have a bigger screen. That very real want is what is driving attempts at folds/rolls. What if goggles can offer up a virtual iPhone or iPad with up to IMAX-sized screen if you wanted it? No crease. No hinge.
This article reinforced my own imagination of "killer app" being as simple as "any size screen in a small, light mobile package." It makes me still envision the new kind of laptop, which is basically bottom half of the MB now + Goggles in the laptop bag... used just like we use laptops now (which is when we need them) EXCEPT now we can have ANY size screen on which to do our work instead of only up to 16 inches. A variation of this concept already exists because people are taking MBs with broken screens, disconnecting the top half and using the bottom half with existing screens...
Goggles may very well be the much wanted revival of MB 17" and an 18" model, 20", 24", 30", ultra-wide, etc, MINUS all of the weight and size that actually making much larger MBs would require. The keyboard half doesn't have to be larger than the one in a 13"-15". Here, it would not have to be. For me anyway, that
ONE thing done well would be enough at $3K. Even 16" feels extremely cramped when I'm accustomed to doing most of my Mac work on a 40" ultra-wide. I'd love to have a virtual version of that desktop monitor available to me everywhere I might use a laptop.