Yeah but by and whole the talk was more about cons of Scala than pros. If your going to describe a language in terms of another you should list what both are good and bad for. It was a very biased talk that makes it sound like Clojure fixes just about everything, in reality Clojure works well in a band of problems that Scala is not well suited for.

This talk is actually better than most but in general when people compare two languages they bash one and praise the other excessively. I'd like to see an end to that trend and for speakers to start saying what a tool is meant for and what its not meant for.