Ideally you could even have source code that spits out diagrams for more visual parts of a program by embedding small elisp snippets.
Or perhaps you could use it to create elisp games that need a more visual presentation. (I know there is a way to have it read SVG files after exporting them
![Smile :)](./images/smilies/icon_e_smile.gif)
http://pastebin.com/KgjugVnF
I just think it is kind of an *ah ha!* moment to have source code that generates some pictorial documentation when you run a program.
This is useful when you are working with things easily described with pictures.
I've still got to write a function to export .SVG but I've worked with the format before and it is simple to write a small subset.
Please feel free to hack and help if anyone wants.