I've done a fair bit of development inside Postscript (way back when it was one of my favorite languages) and its problem in this context is that it /is/ a programming language, and one that would have to be effectively sandboxed. HTML on the other hand is purely a markup language, is extensible, can be reflowed, and is much more natural for writing documents by hand.
That keeping "up to date" on programming is not reading the latest blog posts on updates to Backbone.js, or learning yet another Web based *MVC or ANTI-MVC framework.
Not sure if this is strictly programming-related, but: Eschewing traditional career-track employment in favor of joining a startup can be damaging, and frequently does not break even with respect to the amount of money and influence you would gain working in a more traditional position.