Why e-paper?
Really, I don't see why anyone would want to use e-paper for anything they have to look at for a long time. Fuzzy, low contrast, and at best very limited color. Eugh.

The technology is fascinating and does have some uses, but I've never understood how it could succeed in devices like the e-book readers, when it's outmatched in quality by an ancient laptop I have with a black and white passive-matrix LCD display. And you want it for a computer? And for coding?

Save your eyes and get another LCD screen. Dim the lights and rig up bias lighting, and you'll save more power than the LCD panel consumes.