https://www.unrealengine.com/en-US/b...-4-16-released
DirectX 12 is now the default renderer for Xbox One, bringing both performance and feature enhancements to platform support in the engine. In addition, you can now develop HTML5 games using WebAssembly and WebGL 2, and this new path will continue to improve in UE4.
New: Xbox One Renders with DirectX 12
DirectX 12 is now the default renderer for Xbox One! We've made a number of stability and performance improvements in DirectX 12. This allowed us to enable it as the default RHI bringing CPU and GPU performance improvements for titles developed for Xbox One.
More proof that my original vision for Xbox One is coming true. The power of the cloud and DirectX 12 will slay all comers. Microsoft is the best in the world at what they do. It's only a matter of time before people start realizing it.