Yea I usually don't even know exactly what I'm looking for. I'd love an ebook reader which can nail something roughly like the experience of browsing library stacks.
I would love a reading room with a projector that turns a blank wall into a bookcase. It could interact with software on a tablet to "pull" books off the shelf and browse them on the tablet. It could even be responsive to gestures to roll, sort, etc. It seems like we have all the technology to something like this; calibre, Kinect, camera and projector?