Contrary to the Analysts and many in here, I don't believe that the price is going to cause (if a decline) the forecast decline. I think Apple could have priced the iPhone X below the iPhone 8 and still see a world wide declination in sales.
Folks talk about +1000USD for a phone being a high price. But USD2000 for a laptop isn't - USD4000 would be though. But I know a LOT of people who use their phone MUCH more than they use their $2000 Laptop. Thus, in hindsight, it would have made more sense to pay $2k for the phone $1k for the laptop.
If a product meets or exaggerates one's expectations in its capabilities the price becomes tertiary or even less.
It doesn't really matter whether the product is a phone, tablet, ear-lett, watch, laptop, desktop or glasses. They are all fitting the same base-class: computers, representing electronic devices which assist human beings in their daily lives.
On a personal note, I'd rather pay $2000 for an iPhone with a supernatural battery which doesn't exceed size and has 3 days of talk time, 30 days of standby along with being able to withstand daily use-cases a bit better, a device which basically utterly meets and exceeds my expectations of it, than paying $2000 for a 2017 laptop.
The iPhone X could carry a price tag of $500 and I still wouldn't buy it due to all its limitations which anyone can find everywhere on the web. Reason being that I don't buy anything that I don't need or find non-compelling, no matter the price tag. $100 would be too much for that phone because I would never wanna use it. Unless of course I could sell it for $1000 and make $900. But that would satisfy a different and financial need, and not the need for using a phone.
If price were the only criteria that mattered to me and everyone else, we'd just go buy a huawai or Samsung.
In the end what really matters is the pudding. The software that drives the hardware. If someone hacked iOS and let it run on Samsung and Co. I doubt that Apple would sell iPhones at all. Today, I'd rather pay $1000 for iOS and have it run on third party hardware than pay $1000 for an iPhone running iOS. The moment iOS loses its edge over Android (That day will probably never come) the iPhones won't matter at all.