Undifferentiated media?

I came across this quote from Yates & Sumner (1997) :

"Given that the technology itself often does not differentiate between texts, unlike print or writing where the copy of ‘War and Peace’ is destined for a shelf and the ‘yellow sticky’ for the bin, genres increasingly help orientate users to the document and help them evaluate the nature of the document. The overall import of genres comes from the role they play in differentiating between documents, which are constructed and delivered through an otherwise undifferentiated digital medium."

This struck me because I have been thinking of all the various genre exploding out of the technology and that lead to the assumption that the various media were also exploding, but in a sense they are all the same. That might be more of a problem than the variety. Everything gets saved, so we have blogs that are notes for researchers, like this one, and then thee are archived formal, edited papers which are more considered. Both are searchable and often found with the same search terms.

This might be a key to evaluation - What is the genre in which the text is posted?