This story from Mediweek claims that US celebrity magazines are about to significantly ramp up their online presence. As better mobile devices become available and a viable advertising offering emerges for publishers and advertisers over the counter will suffer at the hands of online. While publishers will disagree, logic dictates that moves like those forecast in the Mediweek story have to be considered in the context of the best revenue model for publishers. This means online, ultimately.
Footnote: This story from the New York Times is also on the same topic and talks about Conde Nast beefing up online presence for some of its titles.