Scientists wouldn’t be too impressed.
It’s an engineering marvel to be sure and it would prove some concepts actually do work – Heisenberg’s principle of uncertainty is used to make flash memory, so having a working proof it works and it can be directly used to make something would certainly be of interest to them.
This Heisenberg, not the meth guy
But beyond that, there isn’t that much an iPhone can do for science. It is a data processor that dwarfs the worldwide computing capability by some ridiculous factor, but since it’s an Apple you can’t really program it from the outside so it’s more of a curiosity than anything else.
The engineers on the other hand … they would pass over in shock and drown in their own drool. A microchip? Like a thing with a billion transistors … what are those, is that like a vacuum tube? In something the size of a fingernail? How? How much energy do you say it needs? Come again? And how little heat?
Your best customer might be the intelligence community though. That computing power would not go to waste with them, even if you only have limited ability to program the thing.