Solar and wind aren't the only renewable energy sources addressed in the IEA forecast. Also mentioned is hydropower, though the agency says that environmental permitting and construction obstacles will slow that source's growth; indeed, the IEA expects hydro to fall from 16.2% of worldwide power capacity today to 14.1% in 2027, largely because it will be outrun by solar and wind.
By 2027, the IEA forecasts, solar, wind and hydropower will account for 50.7% of global generating capacity, while coal and gas will fall to 40%. Nuclear, which by some measures counts as "green" energy because it does not produce greenhouse gases, will remain stable but declining at 9.4%, down from about 9.9% today.
https://finance.yahoo.com/news/column-solar-wind-energy-killing-130042166.html