Someone just streamed it and I've watched it on my PS4, i think most of you are gonna be really satisfied, it looks really good even through a compressed 720P stream, the difference between PS3 is very noticeable, the IQ is wonderful, scenes that were pretty ugly on PS3 (that includes vegetation) looks so good now, and that's not including 60 FPS, I really feel like this gonna be one of the better looking games out there, this is gonna be great!
But again it was a big mistake by Sony not releasing Hi-quality footage, some people on the stream obviously didn't see much difference cause of low quality stream and having a rose tinted glasses about how the PS3 version looked, it made an unjustified bad early impression and it's all on Sony.