At a high level I guess so. I don't know enough about Ray Reconstruction (though the results are impressive), but I was thinking of something more drastic than DLSS. Diffusion models on static images can turn a cartoon into a photorealistic image. Doing something similar for a game, where a low-quality render is turned into something that would otherwise take seconds to render, seems qualitatively quite different from DLSS. In principle a model could fill in huge amounts of detail, like increasing the number of particles in a particle-based effect, adding shading/lighting effects...