With all this talk of grass, it's probably the worst part of the PS4 version. When you're stationary it looks nice, when you're driving through it, it's just awful. It pops in right in front of you, or at best off in the distance it's just a blobby color on the ground until you get closer. I love how it looks when I'm walking, but despise the effect of it popping in while I drive through it.
Also, has anyone else noticed that the Ferris Wheel and Roller Coaster give off less color at night? In the 360 version when you take off from the commercial airport you can see it clear as day, but in the new version it's hard to make them out. It all looks much nicer up close, so they're probably just being more subtle with the lighting. The city at night looks amazing from a fighter jet, and the best part is the cars on the highways are there at a distance and can be blown up, whereas in the older versions often the cars were just lights that would disappear once you got closer.