Instead of a counterweight against the USA, two of the BRICs may cracking.
Russia and China may appear strong from the outside, but from within both countries have a lot of issues to deal with. This is no surprise, all nations have problems both big and small. Free countries openly discuss their issues through the political process. While this can be maddening at times, it results in a resilient system that is adaptable and accountable to the citizens.
In command and control economies where the truth is a bit more opaque, this is impossible. The cracks may not be visible on the outside but the stresses and strains of internal problems remain nevertheless. Keep that in mind as you read about the BRICs overtaking the US in economic influence.