The names of the 2018 iPhones probably remain the biggest unknown as no source seems to be claiming that they know the naming scheme. They mostly get referred to as 11/XI/Xs, but now that we're only a few weeks out and still aren't sure, what do we think?
Personally, I have to go with iPhone and iPhone Pro. It fits right in with iPad/iPad Pro, MacBook/MacBook Pro, iMac/iMac Pro, etc. X is a good place to stop the numbering, because it starts to get ridiculous when you go into double digits, and also smartphone design seems to have largely matured that the old tick-tock cycle (eg. 5-5s, 6-6s) may no longer make sense. It would also fit with how Apple seem to be allocating features to the cheaper model compared to the OLED models (eg. LCD vs OLED, single cam vs dual cam, aluminum + more color options vs stainless steel + traditional color options).
Personally, I have to go with iPhone and iPhone Pro. It fits right in with iPad/iPad Pro, MacBook/MacBook Pro, iMac/iMac Pro, etc. X is a good place to stop the numbering, because it starts to get ridiculous when you go into double digits, and also smartphone design seems to have largely matured that the old tick-tock cycle (eg. 5-5s, 6-6s) may no longer make sense. It would also fit with how Apple seem to be allocating features to the cheaper model compared to the OLED models (eg. LCD vs OLED, single cam vs dual cam, aluminum + more color options vs stainless steel + traditional color options).