Not sure if some of you already noticed this or it's just not noteworthy. But I've done some digging and it sure does seem like this is another low-key addition alongside iOS 11. The new OS will ship with "SF Pro" which has 2324 glyphs compared to SF which has 1585 glyphs. Most noticeably is the new lowercase "a" that's featured in the new Notes app as a headline.
What do you guys think?