I want to view various types of content on a single display without constantly switching between different screens avoiding any possible artifacts. Specifically, I'm interested in understanding the difference between a single pixel in a 720p resolution and a corresponding 36-pixel block in an 8K resolution when using integer scaling.
How does scaling cause aliasing (if aliasing is the only problem when upscaling) can't the computer letter/pillar box if ever needed; i.e why can't a 36" 1440p screen (using only 56.25% of its pixels display the same thing as a 27" 1080p screen if non-integer scalling and interpolation is a problem?