Digital Foundry has posted a comparison of the PS4 version of Ghosts running at the pre patched 720p version and the post patch 1080p version. They report that neither of the versions of the game fixes the frame rate drops. However, Ghosts was actually running at higher than 60FPS at certain points, making the game’s frame rate drops less noticeable.
The difference between the 720p and 1080p is quite noticeable, they report. The 1080p is noticeably different than the 720p and takes the PS4 version up to par with the PC version of the game.
SOURCE: Digital Foundry