I believe not - it has the new A14, but they are very careful to say "the fastest iPad air ever", not the "fastest iPad ever". It is probably slower than the A12Z in the iPad Pro and waaay slower than the A14Z, which will (supposedly) power the new MacBooks

It will indeed be interesting to see what CPU ends up in the next ultralight Mac notebook; whether they just use this CPU or have something else designed for it.

Either way, I'm crossing my fingers that my 2015 Air hangs on long enough for it's ARM based successor - even if they just did slap this CPU into a new Air it would run circles around my current model.

The first AS MacBook will likely have an A14X, not the A14.

That is an accurate description of an iPad, yes.

BTW, Apple „switched“ to ARM 13 years ago with the launch of the iPhone.