Colour e-ink would be nice, but you know... a high quality LCD screen would also be fine by me. The whole eye strain thing doesn't really affect me too much, by the time my eyes are really tired I should be sleeping anyway.
The IMP format while it's a bit different doesn't bother me as once you spend 10 mins and install your software it's easy to convert just about anything into IMP, and besides, Fictionwise offers it already.

(For DRM I'm sure they could be sweet talked into supporting a new product by ETI on the ebookwise side of things...)
Ah well, one can dream.