Yes, I know if you wanted an AI answer, you would have just asked an AI. That said, I was also curious, and my fastest easiest way to scratch that itch was an AI answer. It seemed complete enough I decided to share the result.

I think it is interesting that apparently our eyes are accustomed to seeing rectangles. Moreso that rectangles are rare in nature. That must be recent. Maybe it is that we associate modernity as being in opposition to nature, so unnatural shapes such as rectangles fit with our conception of modernity, which we have been trained to value as good. Obviously there is a lot there. And now I'm considering tall vs. wide rectangles.

Imagine that the television could be seen as a window into someone else's life. Windows are rectangles, in most construction. Also imagine the television as a visual adaptation of a stage, which is framed as a rectangle by floor and curtains. I would add these concepts for consideration.