I don't see it shaking out that way. Air implies lightweight. Apple now has a naming problem/inconsistency in their lineup. The Macbook "Air" is now heavier and bulkier than the Macbook. Nomenclaturally, it would have made sense to call the MBA just the Macbook and the new 12" the Air if they intended to keep both. Their is a level of absurdity to that, though. But, they didn't do that, so clearly the Air will fade away, with no more significant changes.
What they will do if sales of the 12" macbook disappoint and the MBA continues to be extremely popular, I don't know. If they can get the price of the rMBP down a little more, it won't matter.
What they will do if sales of the 12" macbook disappoint and the MBA continues to be extremely popular, I don't know. If they can get the price of the rMBP down a little more, it won't matter.