I am all for them myself. Haven't bought any of the retail remasters yet, just some of the indie titles but there are some people on PS4 who haven't played the PS3 at all and are now getting the chance to play some of the big games they missed out on, like The Last of Us.
I do think that there will only be a small window when they can be acceptable for strengthening the catalog so devs will need to jump on the chance while they can, because once the "next gen" games start to flow regularly, September onwards likely, not many people are gonna choose the remasters over brand new games and they will seem more like quick money grabs at that point.
For now, can God of War get another HD remastered super awesome collection, this time on PS4

, I will pay all the monies