Originally Posted by
Mirage
To be honest, user segmentation is probably gonna be what hurts them the most. Yes, you can run all games on any console, but mark my words, there are going to be reviewers saying "this game is great, if you play it on PS4Pro". It might not happen right away, but I'm fairly certain that some games will be a lot better with much more stable framerate on the pro, ensuring that there are going to be player tiers in competitive online play. I'm pretty sure you're gonna end up with snobs that refuse to team up with non-pro players, because they can't see as many details on screen, or because their framerate will stutter now and then and making them easy targets, or miss their shot.
Sony can say what they want, but they're not the ones paying for the extra platform optimization and quality control for the games. Some devs are sure to have too tight budget constraints to be able to support both versions equally.