My bet is on the issue being the interactivity associated with phones and computers, not just the display medium. You'll have just as hard of a time concentrat

My bet is on the issue being the interactivity associated with phones and computers, not just the display medium. You'll have just as hard of a time concentrating on your 5000 dpi perfectly lambertian eink display in 2030 as you do now on your phone, simply because it's a multimedia device built around capturing and redirecting your attention.