Futurology

What a useless product. I don’t even want to exchange information with people when I’m awake!

What possible useful information could I share while dreaming? My teeth turning into sand?

This sounds really cool but also needs the user to learn a language based on facial muscle movements.

https://remspace.net/remmyo/

It's a nice proof of concept though.

Nice try, Dream Police. Cheap Trick already warned me about you.

Big caveats here, no peer reviewed results etc. However, I suspect the basic principle is sound. It makes you wonder what more advanced versions of something like this could do.