Apple's A series of chips are so impressive it's no wonder people want to see these being used in consoles or a Switch-like device (or even better, some future Switch successor from Nintendo themselves.)
All Apple would have to do is give us a new higher tier Apple TV with a little more horsepower and a gamepad, developers would do the rest. Sony, Microsoft and Nintendo should be thanking their lucky stars that Apple doesn't want to move in on their turf in that fashion. It's easy to make the argument that they already destroyed the 3DS and Vita, so we know how this would likely go down.
A series are not cheap SoCs you can throw into a $400~500 console, especially when you have to increase the die size for more capable GPU. The A12 is already 7 Billion transistors, and that's with much less capable GPU than XBox One X. X. XBO X SoC is only like 6 Billion transistors.
The cheapest device with A12 is the iPhone Xr, and that sucker is like what, $800+ even on 7nm node? Sure the LCD and Touch screen ain't cheap, but even with them gone, it's gonna be near what something like XBO X sells, with much less capable GPU and memory count/bandwidth.
A series was built as desktop/laptop replacement chips, and is priced accordingly. As is, the SoC will compete well with something like nVidia Shield TV, but even then at quite a price disadvantage. But for console space, it lacks code compatibility with PC games and powerful enough GPU and memory bandwidth to compete with current consoles. You can't build a console to satisfy core gamers with mostly mobile gaming code base to rely upon.
