Earlier quoted context omitted.
I fully expect any reduction in costs for Apple will get sent to their shareholders, not the consumers.
Bingo. Estimates vary wildly, but I've seen figures saying that Axx CPUs cost Apple about $50 each. Even if it's more like $100, that's still an insane amount of additional profit per unit to be extracted. They don't need to deal with single-supplier hassles and they get much more control over what cores go into their SoC. This is sort-of-OK for consumers but amazing for Apple and its shareholers.
Greater marketshare also provides more value to shareholders meaning that shareholders still win, as do consumers.
More people with macs (and probably iPads/iPhones) would also increase other profit centers for Apple such as services (their highest profit center), warranties, and accessories. The profits and loyalty from these could easily far outweigh the $100-$300 of extra margin they might gain from keeping Mac prices the same.
Meaning that price cuts to macs might actually be more strategically beneficial (to EVERYONE) than hoarding higher margins.