Core77

The 2006 Lemelson-MIT Invention Index reveals some current attitudes held by teens towards obsolesence of existing technologies.

a third of teens (33 percent) predict the demise of gasoline-powered cars by the year 2015. One in four teens (26 percent) expects compact discs to be obsolete within the next decade, and roughly another one in five (22 percent) predicts desktop computers will be a thing of the past.

Whether you give these predictions any credence isn't the point; attitudes towards new products and technologies are obviously informed by beliefs such as these. And I bet many of the respondents didn't know what a telegram is, or that it's fully gone obsolete.