The defense (against equality) requested a stay by the court from revalidating the gay marriage licenses, until an appeal can be heard. It is most likely reasonable that the stay will be put in place, and this case will probably make its way to the Supreme Court of Iowa.
A link to an article about the ruling:
And even though this is only for the licensing of Polk County, it is noted that any resident in the state can apply for a license from Polk County, providing a vehicle for all homosexual couples to marry in Iowa, as much as they were able to before the ban statute.
This is a civil right, not a right of the states to decide, and one day there will be federal law permitting gay marriage. Eventually, the federal legislature will be composed of people bold enough to draft and pass such a bill. But for now, victories like this must take the lead through court interpretation and bring equality to Americans one county at a time.