People who don't want to upgrade will not be impacted by a mid model revision, as you can bet your house that devs will prioritise the PS4 whilst it has the larger playerbase - it's simple business. It will take years for PS4K to overtake the PS4 (maybe never), and by that time the luddites may be thankful that Sony had the foresight to move the game on.
The concern in these threads boils down to this: I don't want to upgrade, or I can't afford to upgrade, therefore if I can't have it, no one can. Thankfully all the jealous bellyaching on gaf is unrepresentative of the broader market. There's room for premium tier products - I can't wait to sell my PS4 and get in line for the upgrade. Looking forward to 1080P native games with more consistent performance, but hey, for those who find that unappealing - continue to enjoy your PS4.