It can be very fast by itself, and can also be written extremely high level & is very easy to form bindings to other languages, thanks to the multiple dispatch. Even small things such as having full unicode support is very nice to write maths code in a very 'pen and paper' kind of way.
Yes Julia is interesting, but for most use cases the languages is (to my knowledge) still significantly slower than C, while not having the great library ecosystem that e.g. Python has. This might change in the future though, and I know that really bright people like Stefan Karpinski are behind the language, so I'm sure it might become a serious contender to Python in the future.
It can be very fast by itself, and can also be written extremely high level & is very easy to form bindings to other languages, thanks to the multiple dispatch. Even small things such as having full unicode support is very nice to write maths code in a very 'pen and paper' kind of way.