Putting a hardware guy in charge of Apple might help the company return to its roots as a hardware-first company. They've been so distracted by silliness like trying to squeeze more money out of the App Store, iBooks Store, etc., resulting in fines and antitrust decisions going against them in the EU and the U.S. on so many occasions, mostly because the company has strayed too far away from its core mission — to make great hardware and build operating systems to support that hardware and produce a great user experience.
Build a great product, and everything else will follow naturally.
To be fair, that's nothing against Tim Cook. He always struck me as having a good head on his shoulders and being generally a decent human being. And he held the company together through a tough transition, losing one of its founders. That's not an easy task.
But Mr. Ternus has, in some ways, an even tougher job, showing the markets that Apple is more than just a company that sells phones. I don't envy him. But I do look forward to seeing the direction that he takes the company.