However, that doesn't mean that the iPhone 8 and iPhone X have no future. Those iPhones will continue to be compatible with iOS 16, which Apple is likely to maintain for some time with security updates. Please wait a moment and try again. Apple stopped offering feature updates for the iPhone 6 and iPhone 7 series with the release of iOS 16 last year.
To determine your iPhone model from physical details, see Apple's support article on how to identify your iPhone model. If that's you, you won't be able to try out the new features in iOS 17 unless you buy a compatible iPhone. AirDrop has been improved and there is a NameDrop feature for quick contact sharing. In addition, you can combine two iPhones to start a SharePlay session.
Although older iPhones don't support the latest version of iOS or include any of the new features, they should continue to work for a while. If your iPhone doesn't appear in the list above, it won't be compatible with iOS 17 and you won't receive a notification to download the latest software.