[From Stephen Trew] I think this rumour could be a runner. A higher res display would be something to set the Pro range apart from the rest. "Apple's intention to increase screen resolutions on its Mac hardware was signaled by the covert introduction of a HiDPI display mode with Lion earlier this year, and today we're hearing rumblings about the first laptops that may make use of it. DigiTimes reports that Apple is planning to launch new MacBook Pro models with 2880 x 1800 resolution — a quadrupling of the 1440 x 900 res that's currently standard on its 15-inch MBP — in the second quarter of 2012."