Between this, the five day break between series and the four day break after game two, there's officially no longer an excuse to lose this series, unless Parker's injury slows him considerably.
They'll obviously counter by playing Durant a lot more at PF, with more three-point shooting surrounding him, which is normally bad news, but in this case it's an excellent trade off for the Spurs, who no longer have to worry about the Splitter/Diaw issues (as outlined by Harlem) in this match-up and can have their cake and eat it too, as far as playing with ideal spacing more frequently, while not having to give up anything defensively.
Specifically in terms of closing games, they no longer have to have Ginobili on Jackson; instead, Green can become the fifth closer and guard either him or Westbrook, Parker can take the other and Ginobili can hide on Butler or Fisher.