Clean lines and complex particle explosions (like those found on Pxfuel) showcase the contrast and crispness of high-DPI screens.
Long-exposure shots of skylines use every pixel to define individual windows and light reflections, as seen in collections on HDQWalls .
Unlike common 16:9 widescreen monitors (like 4K or 1080p), the 2880x1800 format is taller. Using a standard widescreen image often results in losing the sides of the picture.
The is the native "Retina" standard for 15-inch MacBook Pro displays and other high-density screens. To truly "utilize every pixel," a wallpaper must provide enough detail to avoid blurring while matching the exact 16:10 aspect ratio to prevent cropping or black bars. Why 2880x1800 Matters