I have seen articles in several media outlets some claiming victory for same-sex "marriage" and some claiming defeat......I fear with the 670-325 vote we have opened Pandora'a box......
I don't believe anyone seriously believed that the 670 - 325 vote would settle anything over time. If the revisionists lost they were sure (and are sure) to continue to push their case until the next churchwide Assembly . . . again and again until they either win

or are forced out of the ELCA .
Someone on this board wrote that there are two Church subsisting in the ELCA: a liberal/neoliberal, revisionist one, and a traditionally orthodox, theologically conservative one. That has been obvious to me for a long time; and this is true not only for the ELCA but for the ECUSA, UMC, PCUSA, UCC, Moravians, and even Roman Catholicism and Eastern Orthodoxy.
As a sideshow, even Judaism has been going through this for decades with (in separate Organizations) Reform Judaism vs Orthodox Judaism (with Conservative Judaism split into "revisionlist" and orthodox camps.)
In any case this controversy over sexuality is only the tip of the iceberg of a much more profound controversy and disconnect between revisionists and theologically and biblically orthodox conservatives over (1) the nature and authority of scripture, (2) the existence and nature of ultimate truth (postmodernism vs other philosophical systems) and (3) the nature of God (a living, sentient, supreme being or some form or other of concept.)