An honest iPhone 8 launch event would say "we improved the camera hardware but also had some fantastic breakthroughs in the camera software, and we'll be backporting those to all supported models in iOS 11". The pessimist in me says that nobody would buy an iPhone 8 if they did this. Wait a second, now that I've thought it through it's obvious that this is exactly why they didn't backport the software improvements to previous iPhones. :)
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An honest iPhone 8 launch event would say "we improved the camera hardware but also had some fantastic breakthroughs in the camera software, and we'll be backporting those to all supported models in iOS 11". The pessimist in me says that nobody would buy an iPhone 8 if they did this. Wait a second, now that I've thought it through it's obvious that this is exactly why they didn't backport the software improvements to previous iPhones. :)
They said a lot of that come from the new isp, so no.
People with an iPhone 4, 5 or 6 have more reason to upgrade to an 8 rather than a 7 than just the camera.
I think his argument is that they are not backporting other software features including those that are unrelated to the camera.
The improvements aren't just to the software. There's non-software reasons for a, say, iPhone 5 user, to upgrade to an 8 over a 7.