I worked on Windows 7 and 8 on the Core UX team when he took over and turned the Windows desktop into a touch friendly interface. The guy is a true believer and maybe he is right, but I certainly don't feel like my iPad gets much use anymore. Most headlines I hear seem to be about declining sales and I can't help but recall the overwhelmingly negative feedback from users about the Windows 8 changes.
I always felt like Apple did it right - take the phone and move towards the desktop. Otherwise you are just creating a system that is as bad at the new computing scenarios as it has now become for the old ones.