Once we can reliably induce lucid dreaming, and maybe with the help of some neural prosthesis to capture the output, we can recover all that lost productivity time by having people do immersive vr spreadsheet work in their dreams.
Your comment reminds of of Hillman, who described Jungian dream analysis as "strip mining of the psyche".
back when I was writing XSL-T regularly I used to dream it, probably something about the verbosity of the language made it show up in my dreams, I would wake up pissed off I spent a night with XSL-T going through my head.