I'm completely speechless. This looks so terrible I thought it was a joke, but apparently Nvidia released these demos to impress people. DLSS 5 runs the entire game through an AI filter, making every character look like it's running through an ultra realistic beauty filter.
The photo above is used as the promo image for the official blog post by the way. It completely ignores artistic intent and makes Grace's face look "sexier" because apparently that's what realism looks like now.
I wouldn't be so baffled if this was some experimental setting they were testing, but they're advertising this as the next gen DLSS. As in, this is their image of what the future of gaming should be. A massive F U to every artist in the industry. Well done, Nvidia.
The model only works on the rendered image and motion vectors. Other than the image it has no information about the lighting in the scene, weather or anything else. So in the current form it really doesn't have much to do with realism.
That's like saying that no ai image can be realistic, because it was ai generated.