With the introduction of the Retina display, Apple has guaranteed the following three things: Whether or not Apple has the technology to meet the expectations it has now created with the Retina display on its other products is another issue (i.e., does the technology exist to manufacture a 326ppi 15' retina display for a MacBook Pro?) I now want Retina displays on my next iPad and my next MacBook Pro (and will happily pay a premium for it).
Make no mistake, this is as fundamental a shift as the move from black and white to color TV. By introducing the Retina display, Apple has just changed the rules of the game. The iPhone 4 really does change everything again and not just for phones. The iPad I bought a few months ago and couldn't leave aside? Pixels.
No other display will ever make you happy. The moment you first lay eyes on the iPhone 4's new Retina display, you are ruined. How to make your web content look stunning on the iPhone 4's new Retina display