My screen is 4 and a half feet wide. I use Windows Power Toys on Win and a Tiling windows manager on Linux. Each app goes to their specific location. The center 1920x1080 is for the main focus and the rest is for peripheral/supporting apps.
I must say when you said your screen was 4.5' wide I had a negative reaction. How could someone use that much real estate? Wouldn't your neck hurt from the looking around?
However, after seeing your screen capture I have to say that I'm pretty impressed and kind of want a super wide screen for myself now. Main content in the center with no overlapping windows means that everything is within eyeshot without having to touch the mouse or keyboard. I've always hated the idea of multiple monitors (one for main work and another, often smaller, for tools) but your layout has made me rethink my desires. Thanx!
Some tips - I use the Samsung Odyssey G9[1]. It's curved. The curve helps with having to use your neck as it wraps around your periphery. I think in ultrawide setups a curve is a must if you're sitting close to the desk. Here's what it looks like from sitting POV[2]
I use an Ergotron HX[3] mount for my desk to keep its very large feet off of it and maximize real estate.
