Can the big companies afford to the let print venues die? I don't think so, as none seem to have a strategy to live without them and their (the pubs) ability to reach a very broad audience.
I notice that most of the security publications, Defense News, Homeland Security Today, etc., still maintain subscription walls. Clearly the security market still prefers print. (Actually, according to my totally non-scientific opinion sampling, the security community prefers electronic newsletters.)
The government market is still getting its feet wet with social media, it is growing in influence, but is not yet a lead generator.
We need a better way to sell online advertising. We need to do a better job of explaining the brand awareness and image value of banner ads as opposed to paid search.