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Apple Could Use ARM Coprocessors for Three Updated Mac Models (techcrunch.com)
According to a Bloomberg report, Apple could be working on three new Mac models for this year. From a report: All three of them could feature an ARM coprocessor to improve security. Apple isn't switching to ARM chipsets altogether. There will still be an Intel CPU in every Mac, but with a second ARM processor. Currently, the MacBook Pro features a T1 chip while the iMac Pro features a T2 chip. On the MacBook Pro, the ARM coprocessor handles the Touch ID sensor and the Touch Bar. This way, your fingerprint is never stored on your laptop's SSD drive -- it remains on the T1 secure enclave. The Intel CPU only gets a positive response when a fingerprint is validated. The iMac Pro goes one step further and uses the T2 to replace many discrete controllers. The T2 controls your stereo speakers, your internal microphone, the fans, the camera and internal storage.
They are already getting rid of 32 bit support, soon they will fully iOSify MacOS from OS X to OS i. With an ARMed walled garden. The $5000 iMac Pro is the swan song for Intel Macs. MacOS 10.14 will be full Facebook machines
They are getting rid of 32 bit support because it is a gigantic drain on development and testing (especially the latter) to keep both architectures going.
I don't like it much myself; but I understand their point of view.
It has NOTHING to do with "IOSifying" macOS.