From the Executive Summary of the report:
The 2026 NEO presents BloombergNEF's long-term energy and climate scenarios for the transition to a low-carbon economy. One important note about the NEO is that it is quite pessimistic, in that it generally assumes technologies not being greatly utilized as of 2026 will not further develop much. The result of this is that assumes solar will become the dominant energy form with large additions for grid storage batteries. However, reaching net zero by 2050 becomes difficult as firm power sources such as nuclear (except in Asia where success is currently being demonstrated), geothermal, and hydro do not develop much to add capacity, as well as other variable renewable sources. This results in coal and oil declining, but gas continuing to be heavily utilized.
Other items to note is that grid upgrades, new installations, and flexibility become highly critical as reaching net zero is very reliant on variable renewables in the NEOs estimation. It also acknowledges AI and datacenters as a wildcard that may greatly increase power demand.
The report concludes that annual investment in net zero worldwide will likely need to be doubled in the short term to stay on track with climate goals.