This story is huge and is not going away any time soon. It will dominate coverage at least through the next week leading up to the second debate, and likely well into November. When journalists and historians look back and write the story of this presidential campaign, the events of the last ten days of September will be pivotal.
There has been relatively little speculation this election year about what could possibly be the "October surprise." In a normal presidential election year, this is a fun subject to speculate about when the actual news from the campaign trail gets dull and repetitive. This year, of course, that hasn't exactly happened.