For what it's worth, I'm a backer and "is bigger" is not a selling point for me. 7" to 11" high resolution tablets are a thing, why are there no similarly size

For what it's worth, I'm a backer and "is bigger" is not a selling point for me. 7" to 11" high resolution tablets are a thing, why are there no similarly sized portable monitors (with HDMI/DP input) for laptops?