"Picture this: you pick up your phone, glance down at the screen, open up a document and the text automatically adjusts to suit your eyesight. You’re short sighted so you need the font a bit bigger, the colour palette a little muted and the characters more spaced out. But there’s no need to grab your glasses, because the phone has already adapted to your situation and needs."

Some great thoughts on automated typography by Google Fonts Lead Researcher @Hilary

https://www.itsnicethat.com/features/forward-thinking-google-material-you-digital-050123