Some of his results of the dollar not being the sole currency are a bit over the top. Generally I do think the push to a new currency will happen. His same arguments could have been made when they created the Euro a few years ago which now shows it did not take over the commodities market traded in dollars. BUT I believe the previous years of proposals by countries such as IRAN to not trade oil in dollars may be adopted by communistic countries like China, and Russia (Venz, Brazil, N.Korea). I see a more likely outcome of two commodity markets.
His predictions don't address a military 'operation' scenario. If our backs are against the wall with Iran leading the way, I think the US will find a reason to change their ideas. China is a consumer like the USA so no reason to fight them, go to the source producing country and take them over. Or like I said above, 2 commoditiy markets of Iran/China vs. Saudi/USA.
The US is the largest consumer, so if China goes to a new currency commodities market, the US will just kick them out of our circle and slowly live within our means. I don't see the end of the dollar and riots in the streets for bread, I see inflation and everything expensive as we ween ourselves off China's credit line.
The sky isn't falling, but the debt ceiling needs to come down. If Japan goes to 15% corp tax, the USA better damn well too (just cut all the loopholes so companies like GE actually pay something...)