/sci/ - Science & Math

Brainlet here, with a brainlet question:

If what I am seeing on my computer screen right now is basically ones and zeroes, why are the ones and zeroes from watching a 3D animated film less stress on hardware than playing a PC game on 4K? Isnt just one pixel of the screen I am looking at basically just gonna be a one or zero regardless of what I am doing?

On that note, can a computer create a random scenery that is "real?" Technically, when I take a photo and store it on my PC, it's not like it's making a mental note of how it looks like. It basically writes instructions on how to recreate the image when I copy it right? Does it then possess the ability and instructions on how to create a real photo that was never taken (or done in CAD)?