After listening to the story of the 3 brothers, Harry, Hermione and Ron could understand the importance of the 3 death hallows to themselves as well as to Voldemort.
The eldest brother who owned the most powerful elder wand in the world, was killed by the wand in the end. So it is still not for sure that Voldemort could beat Henry with the elder wand.
The Resurrection Stone, which killed the second brother might also betoken a doom if Harry was intertwined with the resurrection of his loved ones.
The Invisible Cloak could be used to help.The invisible cloak, which brings life to the third brother, might also bring safety to Harry and his friends. Although hiding is not a ultimate settlement of all the problems, but it could earn them time of preparation at least.
With all these in mind, they might be able to defeat Voldemort and conquer death.