In Christian theology, this concept is often referred to as The Second Coming of Jesus Christ and the establishment of Paradise by The Kingdom of God on Earth. Despite the dramatic nature of a prediction of the end of the world, Newton may not have been referring to the 2060 date as a destructive act resulting in the annihilation of the earth and its inhabitants, but rather one in which he believed the world was to be replaced with a new one based upon a transition to an era of divinely inspired peace.
(He also had many other possible dates e.g. Largely unknown and unpublished documents, evidently written by Isaac Newton, indicate that he believed the world could end in 2060 AD. Best known for his advancements in scientific thought Sir Isaac Newton was also big into his apocalyptic prophecy.