There is a question (Showcase of beautiful typography done in TeX & friends) with many great answers showing off the great things one can accomplish with LaTeX. There are books (like Tufte's) that provide dos and don'ts of providing visual information (mostly reducing ink to content ratio).
What are the best examples to show off the beauty of LaTeX output relative to competitors? I'm aware of comparisons of line-breaking, etc, e.g. Moby Dick. Other great examples? (any feature)