Digitimes says we’ll only have to wait until March to get the long sought after 15 (and possibly 17) inch MacBook Airs.

It is uncertain whether these machines will be called MacBook Pros or Airs or just “MacBooks” at that point.  The industry has been moving away from hard disc platter computers with optical drives and the recent flooding in Thailand, where many hard drives are manufactured, has only served to hasten that migration.

Intel is also expected to produce quad core Ivy Bridge i7 CPUs based on a 22nm platter that will shave 10W off the current chip power consumption, thereby allowing quad-core ultra portable laptops.

Beyond energy consumption benefits, Ivy Bridge processors have a 20% increase in CPU performance and up to 60% increase in integrated graphics performance over current Sandy Bridge models. They should also support 4K video.

The new MacBook is expected to appear as early as the second quarter of 2012, according to the report.

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