Intel driven MacBook Pros have secondary ARM processor for Touch ID and security
Not really that surprising. Your average laptop nowadays probably has more ARM cores than x86 cores. They're in all kinds of peripherials like wifi controllers, power supplies, harddisk controllers, GPU job control, heck even AMD's recent APUs come with an integrated Cortex-A5.[1] ARM cores are everywhere, people just don't know about it.[1]http://www.anandtech.com/show/6007/amd-2013-apus-to-include-...