The Tablet PC I have is an HP TC4400. The screen size is 10.4". With a resolution of 1024x768. I work in front of a computer all day long and find that when I try to read eBooks on my Tablet PC, my eyes seem to be strained. My assumption was that the strain was due to the refresh rate of the LCD.
One of the big advantages to the eInk devices was the lack of any refresh rate. Less strain on the eyes. Hence why I was interested in the Sony eReader.
Incidentally, I think I have made up my mind and I am planning to purchase the Sony eReader this afternoon. Thanks for all the feedback!