After a quick glance at the tutorial, the most intriguing bit seems to be the support for macros, which work (almost) like function definitions. Interesting, but nothing that gets me overly excited.I have same experinece. I read tutorial two days ago and I think it is mostly only scheme with macros and syntactic sugar. I am not so much familiar with lisp and scheme, but I think there is nothing what can't be done almost same simply in scheme or other lisp dialects. Updated: think similar:
My own impression of Arc is that it's not significantly different from Scheme.