Screen Display Resolution and Density

The size and resolution of screens has increased dramatically in the past several years. At the same time pixel density has also increased. Superior resolution has improved the the user experience. However to optimize content and layout for high resolution screens, website developers need to adapt accordingly.
WURFL device detection can identify smartphones, tablets, smart TVs, and other devices. WURFL can supply physical pixel resolution, CSS logical pixels, and physical dimensions. It can also calculate the pixel_density and provide the density_class of a display.