More on eAudiobooks

OCLC's "It's all good blog" also comments on the AP story regarding digital audiobooks in libraries. Here's the line that got me thinking:

"You can even be so bold as to send the link to your mayor, city councilpeople, etc. with a short proposal of why eAudiobooks in YOUR LIBRARY would improve literacy rates..."

Last time I checked the definition of literacy was "the ability to read and write." Just how does listening to someone read a book during which you cannot see the words being read help someone become literate?