Interesting views. (FWIW I read fiction, not reference material)
Back when I got my first, 5" Astak Pocket pro, I discovered that the screen's width MATCHED the width
of the print on the page of a standard US paperback. The bezel provided the blank space around the words (IMHO no need for more than a px or two for side margins (One of my
touch-ups I do on all books I buy. ADE needed 16 on the right for those block numbers, but now I just use 2 all around)
The only 'annotation' I do is when I find errors I want to fix (and gripe to the seller). I find any keyboard with keys smaller than a 'standard' desktop one, difficult to hit (only
) the proper keys .
Intended usage (reading material), should bias your device selection. I still believe that ONE SIZE FITS ALL type of a choice is a poor one,