Gigapixel is a program by Topaz Labs that is able to enlarge small and low-quality (pixelated) photos, while enriching them with higher quality details (between and within the original pixels) by drawing upon a training dataset of thousands of photographs.
If you start with a grainy, old photo taken on a lousy camera, then process it through Gigapixel by upscaling it, for example, 4x in size, it comes out looking as if it came from a UHD DSLR and flawless. Let's just say it looks 10x better than the original, even at a 25% zoom out, and assume that no weird alien-like AI artifacts appear.
Now that it's high quality, what happens then if you downscale this high resolution image back down to its original size (one-fourth of the 4x blow up)? It would still look 10x better than the original right?