It's called zooming. I can view gigapixel pictures if I want. And if I want to see more detail, I zoom in. So yes, those pictures fit fine on my monitor. I mean, have you never heard of super-sampling?
Also, my screen is 3.6 MP. A 4K screen is 8.2 MP. But don't worry, you can still zoom in to see extra detail. Your desire for 16x9 photos at 1920x1080 is already not good enough.
My favorite part of your link is where they took a high-resolution photo, and cropped it to share. Something you wouldn't be able to do. It's also a guide that gives every example under the sun for making the filesize smaller, it's not exactly a great reference for your point at all.
Also, is Google wasting everyone's time:
https://www.google.com/culturalinst...-monkeys/WAHc3JWW3F7kQA?projectId=art-project
They shouldn't bother with infrared scanning and deep zooming because I can't view the whole thing on my monitor, today, anyway? What a garbage argument. If you care this little for your photos, why are you even taking them? You've already said they'll go online never to be looked at again. So why are you even going through the motions?