David Seifman in the NY Post points out that the Republican gain of Anthony Weiner's former seat is more than symbolic, i.e. it means the Ninth District won't easily be gerrymandered as a result of the 2010 Census:

With the state slated to lose two House seats, there was a wink-wink deal for Weprin to step aside for the Democrats, while the GOP took out one of their own upstate.

Now Crowley has to find another sacrificial lamb.

Turner also looms as a threat who could challenge nearby Democratic Rep. Gary Ackerman should the 9th be traded away in the redistricting scramble.

The generally assumed done deal was that the Democrats would give up one seat -- Weiner's New York City District -- and the Republicans would give up one District upstate, way north of the City.  But now the victory by Bob Turner in NY 9 greatly upsets the Big Apple cart.  Will the Democrats also have to choose an upstate district to sacrifice?  Or will the NY Ninth District still be gerrymandered, as Seifman alluded to in the mention of the neighboring NY Fifth District represented by Gary Ackerman? And in exchange for what?

Decades ago, Ackerman actually represented the northern part of what is today the NY Ninth District.  But Census population loss in the state (due to high taxes) led to Ackerman's  moving northwest in Queens County to NY 5. Either way, the Democrats will have to lose a Congressional district somewhere in New York State to complete the bipartisan two seat loss post-Census deal.

As for defeated candidate David Weprin, he's still not conceding, as of Wednesday morning, stating that all the votes haven't been counted yet (11 percent remain to be tallied). Although Queens County has the most cemeteries of any borough of New York City, those "resident" votes won't be tallied in the District as they often are in Chicago, greatly decreasing the chances of a "Lazarus vote" late surge for Weprin. But he  still has his State Assembly seat, for which he should be grateful.