The report claims that engineers within Apple are confident that A-series designs will power future Macs, including the popular Macbook Pro and Macbook Air models. The most recent design is the A6X, seen in the fourth-generation iPad and featuring an efficient and powerful dual-core processor.
That being said, the sources claim the move will not be made in the "next few years" due to contracts with Intel, but the shift is "inevitable" as devices like the iPad "blur" the lines between mobile and desktop computing.
Apple CEO Tim Cook did note earlier this year that ARM chips for Macs was a possibility into the future, without saying much else.