At the most recent London Perl Workshop, 'Perl 6' was only mentioned during a single lightning talk - and the plea was to call it something else (Rakudo was suggested). As the speaker (Edmund von der Burg) said: each time you say "Perl 6", Perl5 dies a little.

IMO, Rakudo (or Perl 6) will not make Perl 5 die, just as Ruby, PHP or Kurilla did not kill Perl 5. Perl 5 will only "die" if people stop maintaining it^* - and even then it will die only slowly. It's only truely dead if noone uses it anymore.

^* Which means that it's up to you (a generic you, not just Tony). Musing about whether Perl 5 will die or replaced by Perl 6 on Perlmonks doesn't help Perl 5 at all. If you want Perl 5 to keep living, contribute. Write patches. Write bug reports. Write tests. Add to the documentation. That matters. If people stop contributing, Perl 5 will die, regardless what Perl 6 will do. If people contribute, Perl 5 will live, regardless what Perl 6 will do.