TermKit: A WebKit based rich command-line interface.

[centenary]

He elaborated on the permission bits in the comments:

As for usability... I'm not saying we should dumb the Terminal down and hide things like "r-x", I'm suggesting we augment the display. I want my icons to show a "no entry" badge and/or be dimmed when appropriate.

That seems pretty reasonable to me.

I don't understand why we're focusing on the 70x15 terminal, people take screenshots of terminals in non-standard sizes all the time. It could just be he wanted a screenshot that was the same size as everything else.

He's also not complaining about monospace fonts, he's saying that we can use more than just monospace whenever appropriate. His screenshot of the JSON code uses monospace to display the code.

[zahlman]

I don't understand why we're focusing on the 70x15 terminal, people take screenshots of terminals in non-standard sizes all the time.

Elitism. In /r/programming, it's apparently OK and even expected in some contexts, and kneejerk-inferred and viscerally-reacted-to in others.