>From what I can tell, it doesn't look like the recent GPT-4o image generation includes the research of the NeurIPS paper you cited. If it did, we wouldn't see a line-by-line generation of the image, which we do currently in GPT-4o, but rather a decoding similar to progressive JPEG.

You could, because it's still autoregressive. It still generates patches left to right, top to bottom. It's just that we're not starting with patches at the target resolution.