Re: This doesn't surprise me
@Aitor 1: Macbook Air battery life with Macbook Pro 13" performance? To be honest, with the iPad Pro that end of the product line seems a little cramped. Perhaps it is an upward creep to the Macbook Pro line as they feel they are constantly waiting around for a performance/power kicker from Intel? That would give more synergy (MBA-ism, sorry) between the iPad Pro line and the next portable item up, leaving the real meat of performance in a (hopefully) revamped Mac Pro which would (presumably) remain Xeon.
iMac and Mac Pro to be Xeon, all else Apple ARM? Given where the bulk of sales sits it kind of makes sense to be master of desired characteristics in the volume segment and just buy in at the server-grade end from Intel/AMD.