At its core lucuma helps with creating custom HTML tag elements (Web Component) encapsulating content, style and logic. It is not a fancy MV* framework and aims at being a thin layer building on top of next generation web standards (mainly Custom Elements and Shadow DOM).
It also makes the extra effort of being flexible and open to existing ClojureScript standards and libraries.
Lucuma is conceptually similar to polymer, x-tags or Polymer.dart.
Via Jan Hesse