The Perl 5 diehards aren't going to switch, and people who aren't already Perl hackers are going to think it's the same old Perl that scared them off ages ago.
It's a shame, because Perl 6 is a great language (and I say this as somebody who was put off by Perl 5), and the Parrot VM is particularly awesome.
It also has some of the best error reporting I've seen: it offers a number of possible solutions, and if you try to use a Perl 5-ism that's not supported anymore, it'll tell you what the Perl 6 equivalent is.