And marketing was right. The A9X pro came at the same time as the Core M 12in mac and was actually more powerful. An A9X 12in mac with enough RAM would have been even more capable... But at that time Apple was not thinking about that transition. The idea came the following year after the disappointment with Skylake, according to what some insiders have said...Note—officially iPads have had “desktop-class” chips since the A9X iPad Pro, according to Apple’s marketing.
But yes it’s really funny how our perception is heavily determined by what we see first. Along that same vein, I mentioned this in another thread, but I wonder if the iPad had been released before the iPhone, would people have called the iPhone “an amazing pocketable iPad” instead of the iPad ”just a big iPhone”…
As for iPad first... as you probably know that was the initial plan according to Steve Jobs... but I think a phone without a store made more sense than an iPad without an app store... so I don't know if the iPad would have had the same success with an even less powerful chip and no app store...