At this point, it’s pretty much surefire that Apple’s next iPhones, namely the iPhone 13 and iPhone 13 Mini, are going to look pretty similar to the iPhone 12 series of phones. The overall size of the devices is expected to remain the same. They also keep the new flat design, OLED screens, etc.
That being said, we certainly can’t say the iPhone 13 will be “identical” to the iPhone 12. Although this upgrade might seem like an “S” version (in fact, some still believe the iPhone 13 will be called the iPhone 12S), we expect to see a smaller notch.