I've been thinking about how I use the edge and eReaders in general. I read books only occasionally, but I spend most of my time looking at technical reference documentation where I frequently need to flip around to different pages. A single display eReader makes this frustrating. The dual screen eDGe provides some relief, but isn't as convenient as I'd like.

What I thought would be useful (for me [and perhaps only me :-) ] ) would be totally dumb, slave displays (eInk panels) that do nothing more than show a page sent to it by the eDGe. Ideally, this could work over bluetooth [or fill-in-the-blank whatever RF technology comes next]. Hit a button/icon on the edge, and the current eReader page is copied to the chosen eInk slave display. Then I could go on to another section of the manual on the eDGe. With multiple slave screens I could snapshot as many pages as slave screens available.

A business might use them as personal presentation displays, so one person with an edge could drive a presentation with each person using a slave display. That seems more preferable to me than sitting in a dark room, squinting at a fuzzy projector.

Granted, this would probably be practical only when the display, the minimum necessary electronics to drive the display and the communications with the eDGe, and the battery to power it all could be mass produced for $20 to $40 give or take. At that price I'd buy 6 to 10.