This will be pretty nice for accessibility too. Hopefully this leads to Markdown everywhere in the OS, and that follower-OS' add it too. For accessibility, it's great because I can have my screen reader announce punctuation, so it reads star star this star star, instead of no indication of italics at all. Granted, that could always be made better, using speech parameters like pitch and speed to indicate formatting, but that's not found a good home outside of Emacspeak.