Light Yagami's ultimate goal as Kira in the anime "Death Note" is significant as it highlights the moral ambiguity and complexity of his character. His goal of creating a world where he is the god-like figure who judges and punishes criminals according to his own sense of justice raises questions about power, morality, and the consequences of playing the role of judge, jury, and executioner. It also showcases the dangers of absolute power and the corrupting influence it can have on an individual. Ultimately, Light's ultimate goal as Kira serves as a commentary on the nature of justice, ethics, and the human condition.