I skimmed the article but this seems heavily influenced by Quasar http://docs.paralleluniverse.co/quasar/ but doesn't make any mention of it.
I have some experience with it and I found it to be a very well designed and documented API. I hope to see it in the JVM someday.
The person behind it is pretty active online and does some other interesting things (the TLA+ subreddit), not sure if they are an hn reader but I hope they chime in here.