[jyl]

Intel's rate of improvement in its mainstream desktop processors has slowed so much that a 2016 isn't significantly better than a 2015, unless you're a spec geek. iMacs aren't gaming machines so the latest video processor doesn't matter. Basically, the technology of desktop PCs is pretty stagnant, so there isn't much reason to crank out a new desktop iMac every year. I'm not sure mainstream PC makers are doing that either; if they are, it sure isn't helping them grow revenues.

The Mac Mini is, I think, deliberately being ignored because it represents an alternative to the iMac that is less profitable for Apple.

I'm not sure about the Mac Pro. Its unit sales are so tiny that it may be hardly worth updating, but it represents Apple's commitment to a certain type of creative pro, which is being questioned, so Apple probably should be spending the money. I personally prefer the previous roomy tower to the current tightly packed cylinder.

Basically, laptops are where it's at so Apple is going to keep those fresher.