For both use cases I don't see how it would be any different that what anyone can currently do on their mobile device. And even if they were novel use cases, they are nowhere near solving a need that causes more than a few hundred people to pay money for a device or service.
I mean, you're both right. Being able to chat and iterate on stuff while I'm driving is both more productive and feels more natural than I expected before I did it. It wasn't too far removed from a brainstorming session I'd have with anyone on my team, except it was only me and ChatGPT. So there's probably a whole bunch of similar but adjacent use cases that I haven't even thought of you.
But... I can already do this! My phone + CarPlay and/or my headphones actually works great. I don't see how a new device adds value or is even desirable. Unless you're going down the Google Glass/Meta Rayban path of wanting to capture video and other environmental detail you can't if my phone is in my pocket.
