Hmm. I'm not sure how true that is, but that might be a perception thing because hoods have gotten longer and windshields have gotten more slanted. Being farther from the front of the car/windshield makes your view angle smaller even if the height of the window hasn't changed.

Surprisingly, sloped windows are more of a safety thing than a fuel efficiency or aerodynamics thing. If the windshield is too sloped, it acts like a wedge that throws air up above the car and causes a ton of turbulence. It's more important that the airflow stays stuck to the top surface of the car, and a steeper windshield helps with that.