Voted for: Touch screen, Document search, Dictionary, OPDS.
Just like
Jellby i want: support for multiple formats and annotations (in some format that allows to see
and edit them on and off-device)
Additionally: A good virtual keyboard and optional external keyboard via usb or BT. A modern screen with fast refresh and good readability even under direct incidence of light. It doesn't have to be e-ink but should be easy on the eyes and energy-efficient.
All in all: A device for reading, annotating and to a lesser degree writing too.
Forgot to vote for Wifi.
I wouldn't buy a 9.7'' device for reading only. I want work with such a device...