Sure thing.
I played for about 20 minutes now and I am impressed. You definitely notice the 60FPS right away, game feels a lot smoother than it did on PS3. Visuals aren't that much better, but the textures definitely look better and the character models look especially good. Photo mode is also really cool, I expect too see some amazing images around the net in the days to come (quite a few good ones already). I will attach 2 early shots I took just to check it out. Haven't had a chance to check out the MP yet, will give it a try a bit later during the day or tonight maybe.
If you've never played this game and you have a PS4 you owe it to yourself to go out and buy it. This is definitely the best version of one the best games of the last generation. Even though I finished it on PS3 I'm definitely going to play through the main game again before going for the Left Behind DLC, I want to experience the whole game with the new framerate and visuals. Haven't tried the 30FPS lock option yet, not really bothered by better shadows at a lower framerate.