An anonymous submitter writes "This AP article, citing a study from the U.S. Commerce Department, reports that "Almost all U.S. families live in areas where a high-speed Internet connection is available, but many see no compelling reason to pay extra for it." The article mentions a survey that found that "more than 70 percent of dial-up users cited cost as the main reason they aren't upgrading to faster access.""
It's much like digital cable - the cable networks ratch up the price for...music channels? But broadband is a chicken - egg problem. You won't get people signing up until they see a reason, and you won't get compelling reasons until more people have signed up.