It's reclaiming the Perl name since Perl 6 has abandoned its connection to Perl and is claiming to be a completely separate unconnected language.

This is the logical conclusion to this divergence and will mean that going forward people wont think Perl 6 is the newest version of Perl. That problem would still exist if you leave Perl at 5.35 since search engines are still happily returning pages for Perl 6 even though it's no longer a thing.

It is to resolve question of Perl 5 continuity. Something that Python 3 has not accomplished.