For what GP mentioned ("systems automation") depending on the JVM (as one would with Clojure) is kind of a non-starter, due to the long startup time. By contrast, Clojurescript (essentially the same language, but compiled to JS instead of JVM bytecode) can run in something like Node.js, where startup times are considerably faster.
Edit: this new development (CLJS compiled with CLJS) is remarkable because previously, compiling CLJS required a running JVM. One could still compile automation scripts and run those, but that wouldn't really be true to the "scripting" style anymore.
