Here are some more blog posts about the project: http://pchiusano.github.io/unison/

As far as I can tell, the goal is to put interaction with a UI on the same level as editing a program. To this end, Unison expressions, values and UI elements all live in a single syntax tree which can be edited in a structured way.

A demo would go a long way toward making this all clearer. Even some text describing what it would be like to use the finished product would help.