[nkrisc]

I can only speak for myself but it makes me unconformable because it makes me feel like I must be super productive for 8 hours straight lest the big boss happen to walk by for the 3 minutes I'm taking a mental break to read something interesting and completely unrelated to work.

[RasputinsBro]

If the big boss happens to walk by for the 3 minutes you're taking a mental break and that is a problem, I would say the problem is the boss/culture, not the space.

Think about it. You just said that someone "catching you" taking a break is an issue and that in your mind that is a justification for keeping your screen hidden.