The iPhone 7 is probably going to be noticed more for what Apple has removed, rather than the faster processor and improved dual lens zoom camera, since this is the first iPhone without a headphone jack.
Apple is notable for removing features on their new products though – laptops and desktops (iMac) with no floppy drive, and then later, no optical drive (MacBook Air).
PCMagazine added this perfect statement:
People who want iPhones don’t want them because of the spec sheets. They want them because of iOS, third-party iOS apps, Apple’s service and support network, and the community effects of Apple-only systems like iMessage.
Apple has succeeded so well at creating desirable products, that if they announced an iPhone 8 today with no new or additional features over the just announced iPhone 7, people would still buy it, just because it’s “one better”.