Right now the retail version of AC4 is running at 900p but Ubisoft is close to release a patch that will up the resolution to 1080p and add AA to the game.
Why?
But why ship at 900p in the first place? To meet an essential goal: deliver a visually brilliant game at a steady 30 frames per second (the industry gold standard for open-world games). Finishing the game at 900p gave the development team the extra room in terms of the GPU and CPU usage to ensure the framerate never dips below 30 frames per second. The team then used the time between the ship date and the release to focus on a title update that could deliver native 1080p resolution on the PS4. |
So the dev team worked on the 1080p optimizations after the game goes gold.
http://blog.ubi.com/assassins-creed-iv-black-flag-in-native-1080p-on-playstation-4/
I don't like the ideia of day-1 patches but I don't like the ideia to play games below 1080p too... so this patch is more important than my issues with day-1 patches.
Next time do the job right Ubisoft... that's the minimum I expect from any dev.