Most advertising for iPhone 15 seems call out that it's made of titanium... there is nothing else of note.

I have one and I do love it but the only innovations I'm interested in going forward are:

- get rid of the camera hump, make it a true slab (even if that means smaller/fewer cameras) - engineer away Dynamic Island.

Then it's really done with this form-factor, and I'll be waiting for holographic projection out of my watch.