Firstly, it is annoying when people believe it takes an entire team to dedicate to a remaster. You're not re-writing a story and often not adding any new gameplay elements, so all the writers, creative directors and gameplay/sound programmers aren't occupied. Literally, it is only a tech team that consists of very few people relative to the number of people in a studio.*
It doesn't take away from resources. While the creative team is building a story, the engineering team is working on a remaster, the work they do improves the engine for the next game, when they are done they are ready to board the new project as the programming team start building the game.
Graphics programmers and engine programmers need to adapt to new hardware, so it is better that remasters are done in year 1,2 and 3 of hardware, so they learn the skills to make better looking and performing games in years 3, 4,5 and 6, which is historically where all the better games have been in a consoles lifecycle.
In this case, Sony may not be doing you a service by releasing games you've already played. But there are millions of potential wii and xbox owners who didnt get to experience those games, and probably never will, so there is nothing wrong with re-releasing the best of a generation on the next generation.
Finally, sony have published only one disc remaster so far. TLOU:R, with two more in check (GOW3 and Gravity rush). Not bad for a studio which revealed 9 new ip's last gamescom alone and more at PSX. Click Here pl0x
*Corrinne Yu, graphics engineer of The Last of Us remastered fame said in an interview, any work she did to imrpove TLOU:R improved Uncharted 4 prospectively, and it didn't take her away from her work on U4 because tech is built collaboratively with a game.












