I strongly believe that they built this game in the first place with the PS4 in mind. I believe that all these so called "new" higher textures were done on its first development and then scaled down for the PS3. Naughty Dog are masters when it came to the PS3's CELL hardware so it probably wouldn't have taken them long to port things back and forth. They also were probably one of the very first dev teams to get their hands on the PS4 SDK. This to me is like day one DLC, its stuff they made when the game was in development but held back this time due to hardware limitations. I think this shows with just how poorly TLOU performed on PS3 with sub 30fps heck I swear at times it was under 25fps mainly because the game was more than likely built for the stronger hardware of the PS4. All this said and done, does not take away the fact that the game is a masterpiece of video game design, story telling, pace, action, and amazing atmosphere. Just a shame the ending completely sucked.