Soon, you may get the chance to experience Retina Display on your Mac, if the recent rumor surrounding the upcoming Mac OS X Lion is to be believed.
Taking cues from iOS, Apple has reportedly built in support for what it calls “HiDPI display modes”. These HiDPI modes allow developers to supply 2x-enlarged images to support double-high resolution displays. Like the iPhone 4′s Retina Display, this means that user interface elements will remain the same size, but everything will be twice the resolution and therefore twice as detailed.
For example, instead of a 1440×900 pixel 15″ MacBook Pro, you could have a 2880×1800 pixel 15″ MacBook Pro. All the screen elements would be the same physical size as elements on the 1440×900 display, but with a much higher level of detail. Developers would simply need to provide 2x-resolution images for their user interface elements, just like on the iPhone to support its high resolution Retina display.
Mac OS X Lion is expected to be rolled out later in summer.