IP3 are organising a debate at the House of Commons about digital printing. Sometimes these turn out to be panel discussions. This year the issue is around the possible excess capacity for long run books given the growth in digital publishing.
I think that 'digital publishing' now includes online pages and downloads, especially PDF. a related issue is the authority assumed to be associated with different media. I think online is getting better. The Wikipedia is often updated so a stock of printed books may be losing in value, however well edited before publication.
The Online Information show will focus on wikis and blogs. After all these years it is still possible that some of the poeple attending assume that an article in a printed journal is somehow more convincing as a source of information.