I wonder if that has something to do with how our consciousness perceives its reality. We invest all our awareness in the gross physical nature of the world, so if one is fully conscious in a dream, perhaps the physics of that dream are simply being enforced by the comfort zone the consciousness naturally falls into.

I believe this is exactly whats happening. I think our consciousness is trained by our physical realities so the more of it you bring to a dream, the more "physical" stability you bring to the dream. You could usually be semi-conscious and experience flying, random scene changes or even people changing and other strange scenes but I think the more conscious we are, the more stable the dream is.

that our "normal" reality may simply be a 'dream' state adjacent to an even more profound one. It follows that even in our everyday reality, we are still not at "full consciousness", and that this reality is simply a much longer, more drawn out "dream".

This is possible. Maybe we will wake up someday and realize we've all been dreaming, or maybe it's just a single person dreaming about us (now that's going metaphysical).

Haven't heard of this before (and frankly I wasn't sure anyone else had even bothered to try this), but I think I may have accidentally, or rather curiously wandered right into this field of exploration without knowing it.

It's loosely related with "assuming God-forms" in western magic (these esoteric people). I believe it was Grant Morrison (comic artist) who mentioned it once. I saw a video where he talked about a few strange stuff). I believe he extended the traditional teachings to assuming the form of fictional characters like (superman

Planning to start now? ;)

Lol. my concentration and meditation skills are not really good. besides I'm up and about these days. I use to do these things back when I was in Uni (life wasnt crazy back then. lol)