The Council on Tall Buildings & Urban Habitat is adding a new noun to its dictionary—a megatall—which it defines as a building 600 m or taller. As of 2020, there will likely be eight megatalls, says the council. That assumes, of course, that none of the megatalls on the drawing boards or under construction is canceled, mothballed or cut short.
The projected 20 tallest buildings in 2020, just listed by the CTBUH, are in 15 cities in seven countries. Ten are in China. Korea, which has only one supertall building which is not yet completed, has three towers on the 2020 list. (The council now defines a supertall as a building 300 m to 599 m.)