I suspect this will be the last introduction of a MacBook with an Intel CPU. Starting March or June next year will have MacBook Air with ARM, then Mac mini, then iMac, then MacBook Pros. The previous transition (PPC to X86) was very quick. Less than 18 months. They'll have to do the same thing this time again to be coherent.
I certainly hope not. And if so, I hope it comes with a robust x86 and x64 emulator.