In the absence of any corroborating evidence, it will break down to those who believe the accusation itself is sufficient reason to kill the nomination and those who do not. Those who feel the charge is enough were never going to support it anyway. Nor do I see a lot of minds being changed by another few days of political theater. As has been pointed out here, the truth of the matter is irrelevant if it allows one party to portray themselves as the champions of women.
What we will get from this is some additional performance art aimed at energizing the already convinced. But as Trump has taught us, truth is a poor substitute for drama in our current political climate.