One of the most mysterious components of the Apple Watch, which Apple hasn’t really detailed on stage during either one of its media events in which the device was demoed, is the smartwatch’s brains. Dubbed the Apple S1, and referred to by Apple as a System in Package (SiP), the component includes the processor, memory, storage and other tiny but critical parts, and should be further explained once the device is launched and torn apart
Meanwhile, reports from China suggest Apple’s SiPs might be even more important for Apple in the future, as they might be used in next-gen iPhone.
via iPhone 6s specs rumors: SiP processor reportedly in the works | BGR.