yes! and the animation and flexibility is the point that's missed by most fellow commenters.

they enable a font to be parameterized in two dimensions: time and prosody, i.e. speech pattern.

so subtitles and learning materials can be animated to reflect the speech pattern (stressing words, rasing and falling pitch, volume overall, ...) and they can --- independently --- be animated to teach writing, by reading the example.

this is a curious novelty that allows experimenting with the representation of speech and I'm looking forward what will come out of it.