In Rindolf it would be possible to define completely new operator and modify the syntax and grammar of the language on the fly. Thus, the PerlDL guys can easily define the more Matlab like .* and .*= instead of perl's * and dump x in favour of *.

At the moment perl5 uses lex and yacc which I am almost certain will not allow to define new operators. However, I believe such change is something that I've always missed in C++ and Perl, and I really like about Haskell. So, it is going to be implemented.