Not necessarily. Chip designing and fabbing is a complicated and resource intensive business (especially at this stage of Moore's law) that would be an unnecessarily heavy drain even on a company like Apple.This is what happens when you're at the mercy of Intel.
Imagine if they created their own chips for Macs? Then you'd get your updates (at least once a year).
The foundry part of it at least, is best left to the Intels, Samsungs and TSMCs of the world.
 Marketing Team, new (i)Macs may be pushed back in favor of another MBP.