To create the MacBook Air, Apple took out the spinning HD, the optical drive, and soldered in the battery.
To create the new Retina MacBook Pro, Apple took out the spinning HD, optical drive, and soldered in the battery. But they also put in a Retina display--as well as the more powerful GPU and larger battery it requires
The current MacBook Pro IS the Retina Air in everything but name only. It's the thinnest and lightest laptop that Apple can make with a retina display.
In summary: the hard part of a Retina Air is not the pixel density, the hard part is the power. Any blog post that does not address that question is not adding much to the conversation.
To create the new Retina MacBook Pro, Apple took out the spinning HD, optical drive, and soldered in the battery. But they also put in a Retina display--as well as the more powerful GPU and larger battery it requires
The current MacBook Pro IS the Retina Air in everything but name only. It's the thinnest and lightest laptop that Apple can make with a retina display.
In summary: the hard part of a Retina Air is not the pixel density, the hard part is the power. Any blog post that does not address that question is not adding much to the conversation.