I am managing a 7 digit banner ad budget which helps my client generate a profitable 8 digit income in education business. So no display advertising isn't dead for advertisers, because possibilities are more. The problem with Gigaom and DDJ is that they have low capacity with not much relevance advantage. One single programmer can run a web site with tenfold their capacity with a fraction of their cost.
In contrast one can claim banner (outdoor, indoor or web) never really worked except for some carefully chosen "success stories", and now advertisers can measure.
What does "low capacity with not much relevance advantage" mean? My understanding is that DDJ (at least) has great content that "one single programmer" couldn't hope to match.
Relevance advantage means that a site is so big and important in a broad category that it's worth it for advertisers to pay a premium to get frequent views from its readers( think of how TechCrunch is so central to the tech community)
You've hit on a key point: the ability to measure ROI with digital media has drastically changed the advertising landscape. Magazine advertising has always had notoriously low impact, as an example.
Considering that prior to the web, the most trackable advertising was direct mail.
In contrast one can claim banner (outdoor, indoor or web) never really worked except for some carefully chosen "success stories", and now advertisers can measure.