I have good eyes.
I should have been more specific - I would like a higher resolution display capable of displaying an A4-sized document in a readable (albeit tiny) way.
I would then be able to read scanned texts without having to worry about conversion. I am a student and often get assigned scanned pages from magazines and books that I would like to be able to read on my Sony Reader.
I use libprs500 and pdflrf where I can, but some scans are junk. These I print two-pages-per-page, so I am used to reading tiny text.
I agree that an A4-sized reader would be a different device completely.