I would have thought that we've lived in a car-centric culture for generations now, though. How would cars explain why loneliness and isolation have risen just recently?
The report doesn't say loneliness is rising recently. It says technology use is rising and then measures individuals' loneliness, following up with a survey on technology use and a self reported ~"Do you think technology is contributing to loneliness?".
I think for a large part the Internet is replacing television. Is there a suggestion that those spending over two hours/day online (correlating more in the report with loneliness) are being affected by the medium or content or they're just using PC rather than TV?
I'd wager that car use is also up significantly too. Better roads, better cars, more two-car families (28% of US households have more cars than people), kids not walking to school...