>>4
As far as I am concerned they are pushing the envelope on these things:
Function signatures (captures, named, optional, alternative named)
Unpacking (destructuring)
Multidispach
Regular expressions
Passing params from console(MAIN)
Grammars and grammar inheritance
Subtypes
Hyper operator (Yay a new syntax sugar »«)
Hmm, all of that sounds awfully familiar...