I don't understand why they don't scale up the screen size for monitors any further. I've been coding on a 40" 4K monitor for a while now and it's awesome to b

I don't understand why they don't scale up the screen size for monitors any further. I've been coding on a 40" 4K monitor for a while now and it's awesome to be able to see most of my code without scrolling. I would love to get better resolution but I don't want to go back to 32" (4K is good enough for coding but it's definitely pixelated at 40"). You can buy TVs in humongous sizes so I'm sure there is no technical limitation, but apparently they seem to think there is no market for large monitors. The first one on the market with a 40" monitor with a resolution above 4K has my money.