eBooks still have a ton-o-hoops to jump through before accepted as a mainstream way to access the data.
Some of the challenges: Secure content, downstream speed if video / wavs added, hardware configuration needs multiple uses, standardization by publishers who hate each other as much as record labels, etc..
I believe this is a rising technology and EDIG has the potential to be useful if their OS proves valid with the application. No dots, just opinion.
John