Speaking of newfangled OpenType variable fonts, this Decovar “modular parametric control display font” is a nice example: a typeface that has an absurd set of elements that you can control programmatically, essentially creating a “skeleton” typeface with a large spectrum of embellishments (the terminals, the strokes, the contours are all adjustable, but still looks good by blending together smoothly).
Typography might be undergoing a revolution in the next few years!