Nice.
These BRICS leaders will be perfect for countering Western influence in the developing world.
If BRICS only trade with each other using our own currencies, that could significantly dent the hegemony (and thus buying power) of the dollar, increasing the buying power of our own currencies.
Russia seems the most interested in this, they are already trying to stop using dollars, which is a big deal considering Russia has the largest gas reserves on Earth, and they are also currently the number one oil producer in the world.
Russia and Brazil are two of the most resource-rich countries on Earth, and China and India have the largest number of consumers in the world, whereas South Africa speaks for much of the African continent. This could be a big deal, especially in the coming decades.