I always wondered, what is realism? Stating that a rubber cowl, an injection molded rubber suit and a cape is really a graphite shell, kevlar tri-weave and "military memory cloth"? That a character is actually inhabiting a world like my own?
That's a crock. That's called exposition, that's what that is. If these things actually existed in real life, like that crazy *** armored Arkham Knight suit, you wouldn't be able to move. These things are only realistic through explanation, not in appearance. The sonar eyes built into the cowl are just as implausible in TDK as they are in Forever. The difference? We didn't have Morgan Freeman reading it off to us in 1995. Those "action launching" arm blades are just as gimmicky and toyetic as anything Batman has ever been criticized of in terms of commercialism (toys for the kiddies).
Any great film strikes a balance between form and function. Making something because it "looks cool" isn't always a bad thing as long as there's substance to what you're making as a whole. Likewise, it shouldn't just be all about frivolous visuals, you should have some kind of meaning to what you're trying to achieve. I think the best example of this is Star Wars: The Original Trilogy. By simply having an aesthetic (a world that appeared to be lived in, actual grit to it), the audience was brought into the world. We didn't need to hear how lightsabers, speeders, or the force worked. We didn't need technical readouts for spaceships or the droids, you just bought it by visuals alone. The exposition used was to progress the story, not the world the characters inhabited.
Then you look at the Prequels and it's the exact opposite. The world is completely sterile thanks to modern technology. The entire world is explained, like the force becoming "midichlorians" for example. That doesn't make it any more "realistic". This idea of "grounding" a world isn't new. Every filmmaker worth their salt intends to have their audiences sit down for 2-3 hours to invest in their world. Every movie attempts to be based in some kind of reality. Batman or Superman can be made as believable as their worlds allow with a "cinematic plausibility".