No one said anything about replacing the dollar as a world reserve currency, but there is growing demand for alternatives to US financial hegemony.
Considering all commodities are settled in USD, any talk about removing the USD from what is the largest pool, crude, is definitely a primary step in that argument and has been thrown about before by the Chinese, the Saudis (foolishly) and the Iranians.
There is not a growing demand for ex-USD assets. There is a growing call to undermine the US in any way possible that cannot be achieved on pure global trade because the US is the largest consumption based economy the world has ever or will ever know.