There is a feature on the Meta Quest that allows you to “cast” everything you see within the headset, so that people can view it later as a video. It is very useful. My students regularly use it to show in class the things that they have created for homework.
It is possible that one day, given sufficiently advanced technology, we will be able to exactly this with our dreams. When you wake up in the morning, there will be a dreamcast file waiting for you, ready to play.
When you open that file, you will be able to review your dreams, edit them, and ultimately share them with whomever you wish. Or you can just delete them.
I am trying to decide whether this will be a good thing. I suspect that it might not be.