This is by far the most interesting comment in this thread. I think it's a fair ...

pyre · on June 21, 2012

Of the top of my head:

* Domains + sub-domains allows for wildcard SSL cert registrations (e.g. a cert that covers .example.com).

There's also cookie registration.

* How do I differentiate between my_blog_host, my_blog_host_2 and really.my_blog_host? Are they all owned by the same person? Is really.my_blog_host associated with my_blog_host?

quesera · on June 21, 2012

I would like to read a proposal for arbitrary names in a federated, peer to peer, global, and consistent naming system.

For anything really, but let's start with domain names, since we're on the topic.