Kahn, presumably drawing on the opinions of pretty reasonable people, predicted that over the last third of the century living standards would double, despite a sharp reduction in work time. He thought that by 2000 a 30-hour workweek, with 13 weeks of vacation per year, would be the norm.
The irony of this is, the above prediction had a decent chance of actually coming to pass, had it not been for greedy, controlling government and monied interests (think 1913) being given a pipeline to suck the lifeblood out of the populace and derail progress.
Also, I've interacted with people with Krugman's mindset. I'd wager that he STILL thinks of the internet as some occasionally-useful, but still-overhyped communication tool.
