In the questions section one can find a special queue for unanswered questions. It is for attracting more attention of the community and getting a possible answer in the future.
Is it possible to have such a queue for questions without an accepted answer?
It seems the same philosophy that justifies the existence of a special queue for unanswered questions (i.e. the need for attracting more attention of the users to provide at least one acceptable answer in future) justifies the need for a queue dedicated to questions without an accepted answer as well because it is supposed that no answers in such questions were that satisfactory for the OP to be accepted, so they left the question open for receiving possibly better answers in future.