Ironically enough, as the owner of a Nexus 6P, I'm thinking about the possibility of switching to iOS. I'm quite sour on the fact that Google is charging iPhone level prices for an unproven device with marginal internal upgrades over its predecessor. To me, the Pixel XL offers very little to justify paying $1000+ when all is said and done, including accessories and state taxes.
A smaller screen, no upgrade in battery capacity, still no OIS for the camera, and the loss of dual stereo speakers with no mention of a DAC for bottom speaker at the keynote, in terms of a demo of the sound. So what exactly would I be paying for with a Pixel XL that would wow me?
Having said that, like I've said before, if I were to win a Pixel XL, I'd gladly take the opportunity to be proven wrong. Otherwise, if I wanted an iPhone, I'd buy the real deal, not a wannabe iPhone running Android.
My concern with iOS as my iPhone devotee (she's also used Android) best friend tells me is that it's so locked down, and that I'd have to be tethered to my computer.