Can't wait for the language to be as widely used as Python or R. Been playing around with it at home since the 1.0 release and it really is a joy to use.
I wish that Python feels a bit of Julia's heat, as that might be the only way for more PyPy love.
Pypy is basically abandoned project. Main version is Python2 and It has poor support for python 3. The latest version They are supporting is python3.5. Beside that even with Pypy they wouldn't be even close to nodejs. Julia is on par with Fortran or C.
Reason behind Julia amazing performance is its type system. e.g multiple dispatch and value types. Python lakes both. Python also has parallelism problem with GIL.
Mypy team currently works on compiler based on static type annotation: https://github.com/mypyc/mypyc
I think they could gain much more performance than Pypy.