I like the
idea or such a thing, but the actual form factor just has Google Glass vibes. I doubt anyone wants to wear a HAL on their shirt.
It would be cool to have a personal assistant on your body capable of setting appointments, answering questions, contacting people and what not without having to look at and tap a screen. Audio interface is a fantastic use case of LLMs. But I wouldn't do it unless the device was fully hackable. FOSS software, available hardware schematics, these should be bare minimum requirements today, alas they're not. At least with Android the software is available for hacking.
I like the idea of the laser projector, there are times you need to display something visual but interfacing with a phone for that requires a phone, which negates most of the hardware requirements for the device, and interfacing with existing wireless protocols and phone UX is infeasible. It's a good stopgap while we wait for real holographic techtechnology, but only works if it is not a primary interface. The primary interface has to be voice or there's no benefit to it at all.
The form factor is unattractive. First, there's the issue that voice interaction provides no secrecy in public, just as a holographic visual interface would not, then it clips to a shirt and looks like a shoplifting prevention clothing tag with a camera. If it cannot adapt to loose clothing and moving around unpredictably it doesn't make sense to attach it to clothing and needs to be attached to the body in some way.
Socially acceptable accessories are a problem. To be candid, people want to get laid, and walking around with a helmet on your head or a small computer where your pocket protector should be get in the way of this. A watch or glasses are fine, so long as they're not overly obvious in signaling that they're a nerd toy. The problem with a watch is that you can't do the laser display thing without using up two hands. The problem with glasses is that the technology to display high resolution overlays in your field of view doesn't exist yet. The problem with the laser display concept itself is that you need a hand to use it, the same hand you could use to hold a phone with a much better display. So it doesn't really offer an advantage. This form factor is basically a phone in your shirt pocket, camera facing out, with a worse display.
I like the idea, but all in all this does less than a phone running an LLM with a Bluetooth earpiece and mic. I don't think this kind of wearable technology is going to take off until you can get a full computer into glasses that don't look silly with a good resolution display in them that can overlay on your normal field of view. That is a long way off. Even just a personal area network that puts the processing power in a bracelet or candy bar in your pocket, that is, earpiece and display glasses as accessories to existing personal computing, are not coming very soon. It's going to be a while before such wearables are viable.