Agreed, that was a stunningly beautiful way of showing fonts. They're not just showcasing the typesetting, they're also relating the emotion of it by using specific passages of text from different places that match the spirit of the font. I can't believe no-one ever thought to do this before, but I'm still very surprised to see it though.
> I can't believe no-one ever thought to do this before
Lots of sites for typefaces include "posters", "specimens" or other examples of using the font in a context that highlights its best usage, often including quotations.