For sure. I've just got the feeling though that next year will be the bezel year, where the 13" Air morphs into the shell (or thereabouts) of the 12" but with smaller bezels, so 13" screen in a < 1.1kg body. And the 13" Pro will fulfil its destiny and expand into the 14" Pro. Which will give a nice, clean lineup:
13" Macbook Air < 1.1kg
14" MacBook Pro 1.4kg
16" MacBook Pro 2.0kg
And each Macbook by that point will have clear, clean differences in size, weight, screen size, performance and price. Could be wrong, but that's my thinking.