Just to be clear, because this thread subject and content is misleading, Apple is NOT moving to ARM processors.
Apple is moving to Apple processors that are based
on the ARM instruction set or architecture. ARM processors also implement the ARM architecture, but Apple does it differently in a way that is significantly different than an ARM processor, and applications that run on ARM processors won’t just run on Apple processors.
If you have the time and want more information on the difference, check out the following:
The iMore one is very good layman explanation, as is Rene Richie’s forte.