Those saturated images you're thinking of started as HDR but to display them on a non-HDR monitor they had to be converted first. The conversion process uses v

Those saturated images you're thinking of started as HDR but to display them on a non-HDR monitor they had to be converted first. The conversion process uses various tricks like local contrast to make it seem they're still HDR. This can look quite natural when done right. But some people like to crank the settings in the converter to make the images super saturated.