The implications of the doctrine of the Trinity are profound. As Michael Schluter has often said, before anything material existed, there were relationships. Love among the members of the Godhead existed before creation. Love belongs to ultimate reality. Love is from eternity to eternity. In monotheistic religions without the Trinity, there is no-one to be loved before the creation.
The Trinity also means that ultimate reality is unity with diversity. The goal of history is everything becoming rightly related to each other, into shalom, unity in diversity.