Two things to keep in mind, wrt new iPhones:
1.) whichever smartphone manufacturer FIRST offers 10-bit extended color space Capture & Display will rule the day, & immediately render all existing smartphones obsolete ! ... in other words, even the current Flagship smartphones from Apple & Samsung will immediately lose their luster !
Apple's extended color space is called Display P3, and they use the marketing term Wide Color ... they should have called it something else, as selling anything "Wide" to a woman is difficult ... that's probably Phil Schiller's doing !
BGR10A2Unorm is the pixel format type to keep in mind ! ... Apple should have BEGAN supporting it starting in Sept 2016, when they introduced their iPhone 7 family ... so, it's now WAY OVERDUE !
2.) smartphones from Apple & other that don't include a Hardware Home Button, require an extra GB of DRAM to, to support high-performance apps ... this is because without the Hardware Home Button, manually manage the DRAM on a smartphone is difficult, to say the least ... in other words, without it, it's difficult to purge backgrounded apps that are consuming precious DRAM !
It is my very strong opinion that the iPhone 8+ is the best iPhone Apple currently offers ... trading-away Touch ID (+ the Hardware Home Button) for Face ID & Animoji was simply a Dumb Move by Apple !
In fact, the iPhone 8+ could live on as The Last Best iPhone from Apple ... time will tell.
If Apple was smart, they would offer a 5" 8s+ with a higher pixel density display, AND a 3x points-to-resolution structure with NO 20/23 downsampling, and offer it for $650 ... if it included BGR10A2Unorm capture & a 10-bit Display P3 display, then it would sell like popcorn ! ... and Tim would be able to keep his job; otherwise, he is probably out by Year's End.