It's a stylistic transition.One of the interesting things this movie does is make the Christian Bale movies look very, very mainstream in comparison. I mean, they're clearly meant to be mainstream entertainment, and I guess this one is, too?, but the very specific mood/tone/vibe of this one makes those previous movies seem more pedestrian. I don't mean that as a knock, so maybe "pedestrian" isn't the word.
Burton's Batman were over the top and shot completely in kitch studio sets.
Nolan's movies were shot on actual locations. They certainly felt more real when I saw them but they have unrealistic blockbuster moments with big explosions and vehicle chases.
Reeves Batman is one step closer to a gritty reality. My theory is that Villeneuve's (Sicario) style has had a profound effect on how directors shoot their films. Which is good. A return to a Serpico and Taxi Driver aesthetic is long over due.