Wasn't this to be implemented in OS X? If so, why not iOS? Think about it ... with resolutions changing every year or so, this would make apps, interfaces, ect. a LOT easier to maintain and use versus rewriting/redrawing apps based on the device they are used. I can understand iPad versus iPhone/iTouch apps due to differences in screen sizes, but now we'll have iPhone vs Retina iPhone vs. Retina 2 iPhone (unclear if Apple will enhance pixel count for the next iPhone) vs iPad vs Retina iPad. It would be AMAZING if we would no longer have to be concerned if everything was "Retina, Retina 2, or just regular". Thoughts? Possibilities?