The Witcher 3's Lead Engine Programmer, Balazs Torok, spoke with Gaming Bolt where he had some interesting things to say about DirectX 12. Torok said that while DX12 will allow developers to pull more triangles out of the Xbox One's GPU, the shading power inside of the Microsoft's console isn't enough to make it worth it.
He added: "I think there is a lot of confusion around what and why DX12 will improve. Most games out there can't go 1080p because the additional load on the shading units would be too much. For all these games DX12 is not going to change anything". Torok continued: "They might be able to push more triangles to the GPU but they are not going to be able to shade them, which defeats the purpose. I think we will see a change in the way graphics programmers will think about their pipelines and this will result in much better systems hopefully".
What do we take away from that? Well, the Xbox One is capable of 1080p gaming, but what he is saying is that DirectX 12 won't improve the performance at 1080p when it arrives.