A new technique for NVIDIA GPUs may make porting large games to the Switch's successor easier.
Variable Rate Shading
It basically allows textures and shaders on individual surfaces to be reduced in resolution if they are seen as unnecessary at that moment, such as when the room is dark.
Such a technique introduces another element that can be be reduced on the fly to improve performance in addition to overall image resolution.
I don't think the Tegra X1 supports this new feature, but whatever is in the next gen version should support it.