Most of Lisps novel features have been incorporated into the mainstream high-level languages of today: Python, Ruby, JavaScript, C#, Objective-C. The one that's

Most of Lisps novel features have been incorporated into the mainstream high-level languages of today: Python, Ruby, JavaScript, C#, Objective-C. The one that's still relatively unique to lisp is homoiconicity-based macros, but some non-s-expression languages like Nim and Elixir are able to accomplish them. And then there's languages like Clojure and Hy which are gaining mainstream status slowly through over-zealous adoption by disgruntled Rubyists and Pythonistas.