He came around on the Internet (and admitted his mistake), and now believes there will be large productivity gains from Big Data.
http://krugman.blogs.nytimes.com/2013/08/18/the-dynamo-and-b...
Edit: I realize I'm not addressing your larger point. He still may not be the guy to go to. But that being said I think his opinions are more nuanced.
Edit 2: Another post by him on the value of ICT: http://krugman.blogs.nytimes.com/2013/10/11/the-ict-revoluti...