Ermmm I wrote a whole blogpost on some of the killer features for Perl 6 in bioinformatics :P There are a lot of primitive types that are useful for scientific programming. A lot of my bioinformatics work at least gets reduces to bag models and set operations on big files quite often. On the computational side the stuff with native arrays is being built right now, so it remains to be seen how well that will pan out. But in theory you will get an array of native types that will be about as efficient as C. So that's like numpy included as a core part of the language. I left out the nice concurrency/parallel model and native code integration too which are really killer features in general. The ability to write first class domain specific languages that integrate fully into the compiler is kind of incredible. An example is the recent SQL Slang someone hacked together https://github.com/tony-o/perl6-slang-sql/ . You can just inline write a SQL statement and it acts like a for loop over the results returned. Kind of cool!