Although I think the release of these documents are all about Assange's ego, and if it did anything at all, it may have potentially harmed the US and their troops, which isn't good. As it has been stated before, in an unintended way, Assange did us a favor, if its this easy for his organization to get the docs, imagine how easy it is for a potentially hostile foreign government, or terrorist group. If anything, it will hopefully do 2 things...
1) encourage the US government to try harder at being secretive, unless it intended for these docs to get released...
2) maybe make politicians less inclined to make global lies costing thousands of lives because the fear that the could be called out and caught red handed by leaked documents that state the contrary.