I didn't want to take it away from announcement. I see others are saying it might not be as important. I believe it to be main attraction of functional languag

I didn't want to take it away from announcement. I see others are saying it might not be as important. I believe it to be main attraction of functional languages. We don't want to be stuck on single processor forever and immutability is allowing us to spread wings and utilize processors better. So that is why I think it is imperative ( :) ) to have this as a feature of functional languages.