The iPad, like the iPhone, was a success because it did not
attempt in any way to replicate the desktop PC experience in the
way that Windows tablets (and Windows Mobile) did. Apple used the
underpinnings of OS X to form the basis of iOS, but at no point in
iOS do you see anything that could be remotely mistaken for a Mac.
On Windows 8, in contrast, Sinofsky says that there’s no way to
kill the Windows desktop: “It’s always there.”
Beyond the basic device experience, imagine if Mac developers
didn’t need to do any work to get their apps to run on the iPad.
Many of them wouldn’t have bothered. The rest certainly
wouldn’t have rushed.