If you read my post fully you'd see I said since the iPhone 4's retina screen, I also mentioned in a further post that I had forgotten the NFC in the 6.
I've already discussed how I don't consider a new/different screen size a proper new feature. I don't think features like Airdrop are on the same level as the upgrades we've gotten in the S models. LTE is obviously massive but it wasn't really that accessible at launch (In the UK only one network had 4G for ages and coverage was limited to city centre locations in only the biggest cities) so it wasn't really something to get excited about over here for quite a long time after the 5 launched.
Similarly the reason I forgot NFC was because Apple Pay wasn't available at launch over here, so like LTE it wasn't something to get excited over when getting the new phone.