You mentioned the first two on the list, why not the rest? Oh... right... including those paints a very different picture:
Retina MacBook Pro: 491 days since last release
Mac Pro: 1007 days since last release
Macbook Pro: 1563 days since last release
Mac Mini: 706 days since last release
Macbook Air: 562 days since last release
To be fair, the non-retina Macbook Pro and Macbook Air should be removed from the list as their place in the product line is now occupied by the Retina Macbook Pro and Macbook respectively.
That still leaves us with some pretty major product lines looking quite neglected.