Apples ml-sharp is pretty impressive (https://github.com/apple/ml-sharp). It creates Gaussian splats from one image, in a few seconds.
First part of the video, the old depthmap + parallax rendering in https://tiefling.app. Edges are wonky, camera movement is limited.
Second part of the video, exploring the generated splat in https://superspl.at/editor and flying through the image o_o