Added population will be mostly in poor areas where power consumption is very low. Energy demand will likely be driven by US, China and India in the next decade(s), the process there is important and very positive.
Have a look at Gansu Wind Farm in China. [1] They build so many wind turbines there that they had to restrict production until they've finished the corresponding amount of high-voltage cables connecting it to major cities on the coast . Many of these connections have a higher capacity than any other existing in Europe/America. [2]
The potential for wind farms in this regions are huge. It's basically a large, windy desert. With enough cables, you can easily power major cities with it. You can even use it for baseload by combining them with batteries or pump storage.
The reason that China still adds coal is largely one of politics, similar to Trump's promises in the US. Coal adds jobs close to the cities. They've already built too many plants for demand, many will probably only run for a few years (hard to find sources on that, there are no numbers so everyone is just speculating how many there are).
But there are enough resources and potential to power the world's largest energy consumer mostly by renewables. And the picture is not that different for the US, where wind power in some regions is competitive without subsidies.
[1] https://en.wikipedia.org/wiki/Gansu_Wind_Farm
[2] https://en.wikipedia.org/wiki/List_of_HVDC_projects#Asia