[WalterGR]

    This whole area is very underserved in how people
    interact with their computers, glad to see people
    pushing at it.

This is something that I'm extremely interested in improving.

Are there any tools other than org-mode that you have your eye on?

[hammerandtongs]

For the particle cross section of -

outliner

org-tangle/org-babel, literate programming and/or http://www.howardism.org/Technical/Emacs/literate-devops.htm...

broadly exportable format

calendar/todo/personal information management

etc etc

I'm not aware of anything else that covers that territory.

However Xiki and IPython (Jupyter now) do have some of the aspects of the "computational document" that I think of in this broader context.