What definitely made my day was the refresh rate on the small color e-ink display. That looks incredibly promising. I don't need to play movies on an eREADER (stressing the reader part there :-) ), but color eInk with reasonable refresh rate AND contrast... well, that's different altogether.
At the moment, I use my reader (PRS505) only for leisure time and albeit I like some of the new devices (think Nook), I still don't see the upgrade value there as the touch screens have issues of their own for example.
However, this looks like it could really bump the industry. Color annotations on a say 9 inch pad at my office... I like that sir, very much.