What I need is an e-ink device that lets me take notes on it and is large and fast and shows the images in color. Zooming would make it superior to paper. It's just not there yet. I tried to read articles in NCBI's ebook format on my kindle but you can't hop back and forward easily on a Kindle and note taking is of course not an option.
Sounds interesting, but for $420 I doubt it would pay off compared to printing (black&white anyway).
If the stylus is as real-time as they claim (input latency of 55 ms) - it's basically my holy grail device - e-ink that is just like real paper.
https://www.youtube.com/watch?v=34I27KPZM6g
Device is shown with drawing on it at 0:41.
I've been in communication with the guys behind it (via email), and they seem confident of hitting their timeframe. Obviously the proof is in the pudding =).
Oh, and for storing my pdfs and epubs I use Calibre. Also a great app.
I find tablets and e-readers very convenient for reading things from front to back and for full-text search, but find myself resorting to paper copies for anything else.