Personally I prefer that due to the industry I work in. We made it mandatory for any mobile device that houses our information it must be iOS and banned all Android devices from our organization (~4,000 people). Made it easy for our IT team to offer support to mobile users and made my job in Information Security far easier due to the vast improvements in security iOS has over Android.
If you want to customize you can always jailbreak, but iOS has opened up a lot in the most recent versions. I had android for a few years as I liked customizing it far more, but after iOS 8 I returned as the walled garden started opening up more. With iOS 11 it's going to open up much more drastically due to the way apps can work together far more in-depth.
Plus, the one issue I had with Android, it was rare anything just worked as it should. My normal texting habits would crash most texting apps, my phone would overheat and crash a few times a week (LG G3 when it was new, S6, OnePlus1). That's one complaint I've never had with an iOS device. They just work, they get updates for usually 4 years (rather than 1-2 if you're lucky) and all at the same time (rather than 6-12 months after Google releases it), they are far more secure than Android, and apps always work well as they only have a few models to build for rather than many variants.
As long as it doesn't replace fingerprint with facial recognition (at least keep the fingerprint too) and still has a plus size then I'll buy it. They'll still have an iPhone 7S so you can always upgrade to that for the normal prize rather than the fancy iPhone 8 / Edition.