More importantly, these kinds of developments bring the features of hipper, HN-popular languages to the multitude of enterprise Java devs who will likely never be approved to write anything in Erlang, green field project or not.

It's always a good thing when a mainstream language gets better - it positively impacts a lot more people who don't get to use niche languages for their work.

EDIT: My grammar and spelling suck first thing in the morning.