Bloomberg:

Apple Inc. is planning to start selling Mac computers with its own main processors by next year, relying on designs that helped popularize the iPhone and iPad, according to people familiar with the matter.

The Cupertino, California-based technology giant is working on three of its own Mac processors, known as systems-on-a-chip, based on the A14 processor in the next iPhone. The first of these will be much faster than the processors in the iPhone and iPad, the people said.

And:

Apple is preparing to release at least one Mac with its own chip next year, according to the people. But the initiative to develop multiple chips, codenamed Kalamata, suggests the company will transition more of its Mac lineup away from current supplier Intel Corp.

Take with a grain of salt. It’s a rumor. But a believable one, very believable. So logical that Apple would want their own processors in every device they make.

Add in the recent rumors about Xcode coming to iPad Pro (big grain of salt, but still), and it all seems so inevitable.