Restraint is not something the United States does very well, and the recent "pivot" to Asia is probably a harbinger of more to come. Fiscal constraints will put some limits on what the United States can do, but you can bet that the Pentagon sees a coming conflict with China as a major force driver and will push hard for an assertive approach and the preservation of our current "forward presence." Similarly, China's own level of restraint has declined as its relative power has grown, and Deng Xiaoping's strategy of the "peaceful rise" has been gradually giving way to a more assertive nationalism. If China's economic growth rate does not slow significantly, I wouldn't expect a lot of restraint on either side.