These periodic national security statements are usually rather formal documents that recapitulate notions that are already well known.  The most famous one was the 2002 document that enshrined the "Bush Doctrine" of preemption and a push for the US to prevent any "peer competitors" from emerging.

It appears new Secreatry Gates keeps some of that, but clearly softens the tone.  He focuses on what former Defense Secretary Rumsfeld called the "Long War" (another formulation for the War on Terror).  But the focus on raw military engagement is less pronounced, soft power raised as being more needed, and it calls for continued engagement with Russia and China to avoid their becoming adversaries in the near future.

In other words, this last statement on national security from the Bush Administration is pretty non-controversial.  It is a standard document that embraces what everyone already knows the threats to be.  Both McCain and Obama will likely tinker with it, but this is the foundation for a longer term, multi Administration, defense consensus.