Now that is very interesting, wonder what will happen this year as coal should get cheaper in Australia as China are about to finish their railway to their big coal pits in the north west. That said they're also investing heavily in wind and solar which will force prices down with the amount of research they're doing.
Added the link to the article you quoted here:
Unsubsidised renewables now cheaper than subsidised fossil fuels- Australia. | Use Celsias.com - reduce global °Celsius