How would you improve this setup?

Get the new quantum dot tv from Samsung, the bezel less one

Better lamp?

at least a bigger desk. theres no place for the duck

Like any normal user, set two side monitors, take out the yellow light and add some LEDs, change the MacBook for a windows laptop, then format that laptop and install Linux to it, add also speakers and build a homemade USB based docking station, jk, nice setup you got there.