Nietzsche's announcement of The Death of God offers cultural rather than directly metaphysical news, but it is worth taking seriously Heidegger's (1977, 61) interesting gloss:

We need to be careful how we proceed here since ‘Platonism’ isn't all one thing, there isn't a single Platonic moment, and it is any way too easy to caricature: ‘Plato thought nature but a spume that plays/ Upon a ghostly paradigm of things’, which is succinct, but diminishes the reality of both the ‘spume’ and the ‘paradigm’ at the same time. Heidegger's remark seems apposite to Nietzsche's (1968, 40) ‘History of an Error’, to How the ‘Real World’ became a Myth, his readily received satire on the fate of Plato's supposed Two Worlds, the Real one and the Apparent one, the former our origin and goal and source of value, the latter our place of exile, our land of shadows. Once the ‘real world’ evaporates, once we lose our sense of its presence or lose our ever more tenuous faith in its possibility, we are left with only the devalued apparent world (not even that, since ‘apparent’ belongs to a distinction that has just been undermined) and terminal depression sets in (passive nihilism), unless, more actively, we can rise to a radical readjustment of our views about the nature and source of value.