https://techcrunch.com/2025/09/09/all-of-the-iphone-17-model...
I wouldn't be surprised if discomfort from having a bulky phone in your pocket drives this.
I am also guilty of buying a bag (not this kind) for my phone because it's so much more comfortable (and makes my trousers last longer) to not have my phone in my pocket.
I'd believe this is an area where even a few millimeters of thickness makes a real difference in how much the phone in pocket stands out despite the overall footprint being larger? Will be curious to read once people get their hands on the things.