I have this basic question: which aspects of a retina-optimized app are "scaled" to the resolution I pick in system preferences (e.g., 1920x1200), and which elements are not? When I look at Google maps in Safari (a retina-optimized app), the maps look very crisp and not "downgraded" to 1920x1200. Same with photos in Aperture. So my interpretation of "retina-optimized" became that the control elements and font related to the apps controls are scaled to the downgraded resolution, but the graphical elements are not. What I then wonder is why a different approach wouldn't make more sense, one in which one always uses the full 2880x1880 but sets a minimum font size and control element size, instead of scaling the actual resolution. Or is that the same thing? Sorry if these questions are stupid.