Well yeah, no shit Sherlock. They could have done that in the first generation. It takes four 1080p monitors to equal the resolution of one 4K monitor. Apple though doesn't have a good enough reason to support many low res monitors. That's not their typical consumer base, who mostly use retina displays or other high res displays. Apple only sells high res displays. The display in the actual laptops is way above 1080p. In other words they chose quality over quantity as a design decision.