Apple's possible move from Intel x86 chips to ARM processors for its MacBooks is feasible, but not practical over the next few years.



From PCWorld:

In the short term, ARM processors won't be able to deliver the performance MacBooks draw from x86 chips, these analysts said. Apple currently uses ARM processors for the iPhone and iPad, and more power-hungry Intel chips on its Mac computers.

"It's possible that Apple is looking at ARM, particularly for specialty devices like MacBook Air where thin and light is critical," said Jack Gold, principal analyst at J. Gold Associates. "But as a mainstream chip to power all the Macs, I'd be surprised if they went that route."

  ARM Not Ready for Apple's MacBooks, Analysts Said