The most watched programme on the BBC after the news is probably 'Doctor Who.' What has happened is that science fiction has been subsumed into modern literature. There are grandparents out there who speak Klingon who are quite capable of holding down a job. No one would think twice now about a parallel universe.
Poetry is the most subtle of the literary arts and students grow more ingenious by the year at avoiding it. If they can nip around Milton duck under Blake and collapse gratefully into the arms of Jane Austen a lot of them will.