Initial thoughts: Sounds awesome!!
What is Unison? It is an open-source, statically typed functional langauge. Influenced by Haskell, Erlang and a research language called Frank. Unison itself has been a research project for several years and we’ve just started alpha testing (public).
LOVE the branding, and everything he’s said in the first two minutes. Especially this:
We want to make programming more fun, simpler, easier and eliminate needless complexity and do that by willing to rethink pretty much anything and everything about how programming currently works.
What’s not to like about that?!! 
I’m sure I’ve heard their core idea before - didn’t Joe Armstrong also say code should be identified not by it’s name but by a hash of its content?
I’ve only watched the first few minutes but I love everything about this language already - it even has it’s tag line on point:
A friendly programming language from the future.
Definitely one to watch!!
Thanks for sharing Lee!!