I was just looking to see if there were any decent ereaders that could handle research papers in PDF format. I couldn't find anything but I guess there's hope for one in the future.
Great for reading PDFs as they're displayed at about real size.
[1] Yes, there is a shell out there that owns the rights but the original effort/team was killed by shooting too high and flaming out.
On the not-so-bright side, the software is not the greatest and it has a few bugs and limitations.
Sadly, Amazon has discontinued it. And newer tablets are probably faster and/or have better resolution. But if you're willing to change its battery once it dies, a second hand one could be what you want.