Robert
I keep seeing 2(+) different crowds responding here on MR
1) Academic use (Large touch screen, note taking, Dictionary, WiFi)
2) Just the books (E-Ink, TTS, Audio), Ma'm crowd (Catalog Navigation, Long Life battery, Lots of storage (types and loading options), Flexible formats...)
One size does NOT fit All.
The Academic niche looks fairly wide open for a dedicated (low cost, Big Screen) Textbook device. Currently only the DX appears in that area. (Does Astak even want to butt heads with King Kong?)
I belong to Group 2. My phone just make calls , My book reader (PEz), Just does Books

, My computer does the other stuff
Can a I-phone/Droid user yak on the phone and read a document?