Retina Displays: Choking Up the Web?

Apple has confirmed their new Macbooks will feature retina displays. It's clear that Apple is pushing high DPI screens. My question is, will this move slow down the web? People don't seem to be rushing to add graphics that take advantage of the iPhone 4 Retina Display and other +72 DPI Smart Phones' displays. Regardless, increasing the DPI of an image increases file size, increasing page load times. Will the speed of web development be able to compensate for a shift in image file size?

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