Yep. A screen's power consumption grows with the surface area of the screen (w * h) whereas a battery's capacity grows with the volume of the battery (w * h * d

Yep. A screen's power consumption grows with the surface area of the screen (w * h) whereas a battery's capacity grows with the volume of the battery (w * h * d). I think the dominant market pressures so far has been practical concerns like phone thickness and battery life so manufacturers - who are all also competing with their past products - are forced to sacrifice screen size options to compete. Now screen size is becoming unwieldy and screens/batteries have steadily improved so we might swing back the other way.