Gave it a simulation-run and I think I really like this layout!

Working I usually prefer to have 2 normal + laptop screen when docked instead of a single extra-wide ones some at the office use when docking their laptops.

Part of it is that much software today is designed for 16:9 or 16:10 layouts and work less well in 4:3 squared form fashions (why splitting an external wide-screen is often less optimal than 2 "normal" 16:9 externals).

Now, for on the road use I've bought an external 16:9 screen but sitting next to the laptop the head-turn to the left/right is a tad too large to be fully comfortable (When docked I sit a tad further away so the 2+1 screens give a smaller angle).

Finally, coming back to this one, if as the article mentions you get 2x 16:9 layouts stacked on top of each other it'll be pretty neat for coding/debugging/testing. Top part for browser or other target environment and lower part for debugger/code editor without needing to lug anything apart from my computer with a reasonable head-turning.

Just physically tried the layout when writing this with my external USB-screen and it's probably as comfortable as goes without external keyboard+external screens, probably even an improvement over just regular laptop screen since you can look more straight ahead on the top part than with a normal laptop on a table!