I first purchased the PS3 version of The Last Of Us back in 2013. I then decided to buy it on PS4. The game is probably Naughtdogs finest game. The Remaster itself looks a little better then the PS3 version, but not by much.
There is two options for the frame rate in settings, 30fps locked, and a 60fps unlocked. I much prefer the 60fps unlocked.
All the previous DLC is direct on the disc, and requires no download code or voucher, which is a plus.
There is also a Photo Mode in the game which can be fun.