Julia isn't a lisp, but I think it's the most lispy non-S-expression based language around these days. The language creators took the lessons from lisp very seriously, and it shares a lot of functionality and philosophy with lisps.
1. readability with explicit broadcast operators
2. interoperability with other languages including R and Python
3. performance often exceeding numpy and C/C++ code
4. usability in numerous workflows:
The idea of using Lisp or Prolog in a production environment doesn't sound fun at all. Yet, they do make some types of problems easier to handle. =3