The perfect device is an iLiad with a few add-ons:
- 256 or more grey levels ranging from pure white to pure black, around 2 megapixel.
- usable upside down, for left-handed people who like to use the flipbar on the other side.
- Instant tur on - turn off (suspend / restore).
- Calibre as the main internal application, with frequent updates and ebook selling sites interface.
- Multi format reader with search capabilities.
- Google desktop installed for extended searches.
Everything except the first one can be achieved by a good sofwtare development effort.