1. A method of displaying—on a subpixel addressable screen having pixels comprised of separately-addressable, differently-colored subpixels—digital content including text and/or images represented by a mark-up language including tags that dictate the format in which such content is to be displayed and tags that identify images to be displayed as part of said content, said method comprising: accessing said digital content, including accessing one or more images, from a device in which said content is stored or is generated dynamically; performing a down-scaling and subpixed-optimization process in which: each of said accessed images is a source image for the process; said process produces from each such source image a corresponding scaled-down, subpixel optimized image; each such scaled image represents the source image from which it has been produced at a lower pixel resolution than the pixel resolution of said source image; each such scaled image also represents said source image in a subpixel-optimized manner by causing the luminosity associated with each subpixel within a given pixel of the scaled image to represent the luminosity of the subpixel's color in a portion of the source image that differs for each subpixel as a function of the subpixel's different position in the given pixel; and displaying said accessed digital content on said subpixel-addressable screen in a format determined at least in part by one or more tag in said content, including, as part of said formatted display, displaying said scaled images in a subpixel-optimized manner on said screen.