"Zero Point Energy" is basically this extremely far-fetched sci-fi theory that there is a massive amount of cosmic energy floating through the universe. Similar to solar energy (which we can harness with solar panels) ZPE's theory is that this cosmic energy of which there is no evidence it exists, would just need a collector like a solar panel and you turn ZPE into conventional electricity much the way we can turn sunlight into electrical energy. Until legitimate scientists can prove ZPE exists, it's still just a dream.