The use-case is for writing and organizing content in a whiteboard outline that can be intuitively read and re-organized, and which can automatically be translated into a normal text outline format with proper hierarchical ordering.
Visually and functionally I would anticipate these blocks to be able to be nested inside of each other and drag/dropped to be organized spatially, and presumably have positions snapped to some left>right>top>down grid to measure hierarchical ordering.
I intend to draft up a mockup for this but wanted to write it down in the meantime. In the absence of a mockup imagine the image below, but with the ability to nest more corkboards inside each notecard 
Cheers!