Specialization is for insects...and robots.
Robots will, and are, replacing specialists.
In the near future the only thing left for humans to do will be that which requires original thought and creativity...everything else will be automated, and most likely decentralized.

The wide spread use of 3d printing is an example. Soon it will be possible to download a 'plan'....for almost anything...then print it out on your own 3d printer. Much like text can be printed today...much like music and videos...today.

today 3d printers are in their embryonic stages. Embryos grow.