A tiny comment about Augmented Reality.

You mention that no keyboard makes it a slow adoption technology. I agree.

The best way to interface and interact with it would be audio. Talking to the system at times. Gesturing other times.

We already walk around talking to ourselves when we are actually talking to our earbuds, so people talking to their AR glasses won't be any different.

And the LLM's have given us natural language understanding that will allow the glasses to listen to you, send that via an API to Chat GPT, Chat sends back a set of commands, and the glasses do what you've asked of them.

So you're in a foreign land, your glasses will provide navigational information and also translate signage and written text, along with audio spoken to you, on the fly.