True. But the iPod and iPhone were functionally very distinct from the Mac. The Apple Watch seems more like a convenient extension that eliminates the need to pull your phone out, but not much more than that, at least in its first few years of existence. Apple is clearly gearing it up to replace the iPhone, but that trajectory has been evolutionary, not revolutionary.

The iPhone was clearly not functionally distinct from a Mac laptop.

There was nothing an iPhone could do that a Mac couldn’t do better, except for fit in your pocket.

It's a pretty big jump in mobility and utility from the Mac laptop to the iPhone. It's a much, much smaller jump from the iPhone to the Apple Watch.

Except making phone calls.