Gaming site Giant Bomb reports on the upgraded ‘Playstation 4K’ console (code-named NEO):
There will be no NEO-only games, and Sony will not let developers separate NEO users from original PS4 players while playing on PSN. Likewise, Sony explicitly and repeatedly states that developers cannot offer exclusive gameplay options or special unlockables for NEO players—so don’t expect NEO owners to get a level editor or a special Rocket League car that you won’t have access to on your original PS4. That said, so long as both systems have the same feature, the NEO can run an improved version. A local co-op game that features four players on the base PS4 could offer an eight player co-op mode on the NEO, for instance.
This is exactly the right way to release an update like this. Consumers will never have to wonder if a game or an accessory works only on some PS4 models and not others; if you’ve got the upgraded hardware, you’ll get to take advantage of it, but everything will work everywhere.