No clue if the timing (Q2) that DigiTimes is reporting is correct, but the idea sounds about right.
As previously discussed, the MacBook Air has become so good that it’s going to continue to eat into MacBook Pro sales. Apple needs something to differentiate the Pro — especially if there is a 15-inch Air. That something could well be a laptop with a “Retina” display.
It’s important to note that when you typically hear about higher resolution screens, it generally means smaller elements on that screen. But if these screens are double the resolution of current models, Apple could do what they did with the iPhone (and soon iPad) screen, leaving the scale the same while greatly increasing the pixel density.
The drool is already dripping on keyboards of Photoshop and Final Cut users.