i used jekyll as well, and it's alright. this thing gives you the same workflow minus dependency on ruby runtime or a specific hosting platform that supports jekyll (like github for example).
I suppose I chose dependency on Ruby over dependency on client-side JS, though they're not mutually exclusive anyway.
It's a neat concept, for sure, and incredibly similar to something I once wanted to implement for photo galleries (and might still, since this actually seems to work quite well).
i just write stuff and git push it to heroku