Even the upper Pro-level Macs– the new Mac Pro and iMac Pro– come with Intel chips, but those machines represent a small portion of all Macs sold, and most of those Macs, with Intel Inside, are not as powerful as an iPhone.
Many of the certified members of Apple watchers expect the company to introduce a Mac without Intel Inside, but instead, an Apple-designed ARM-based, A-Series chip even more powerful than the A13 Bionic chip in the iPhone. Apple says last year’s iPad Pro models are more powerful than 90-percent of all PCs sold, so it would appear that Apple has the design chops to make it happen.
The questions I see just over the horizon include, 1) does Apple have the executive chops to make such a decision, 2) will the entire Mac line switch; what about Pro models that obviously need Intel Inside, and, especially, 3) what about Windows and Boot Camp?
What we don’t know, and what Apple probably has a better idea of, is how many Mac users also run Windows or Linux in Boot Camp. If the number is substantial– or even just very noisy– Apple would likely make a number of Macs remain available with Intel Inside; that eliminates the Boot Camp and Windows issue.
No Intel chips would also mean that x86 OS emulators like Parallels and VMWare would be more popular, but Boot Camp– with Linux or Windows running on Intel chips– is a more powerful solution.
Another consideration might be to do what Microsoft has already done. Windows runs on some PC notebooks that use ARM-based CPUs not made by Intel. Windows on ARM. I consider it likely that Apple has a skunkworks project going on that could make it almost trivial to move macOS Catalina or Santa Monica or Death Valley or whatever onto its own Apple-designed ARM CPUs.
What I envision though is closer to a pragmatic and realistic Mac line, with its own Apple-designed chips in entry-level Macs– MacBook, MacBook Air, Mac mini– but with Intel Inside on more expensive and more powerful Macs.