Berkowitz hopes that this new tool adds some much-needed usefulness to QR codes and this actually looks like a cool feature.
But the Bitcoin bubbles tell us as much about the usefulness of the currency itself as the tulip mania of 17th century Holland did about flower-arranging.
The problem with desktop 3D printing, however, is not so much price as usefulness.
Even on PCs, cookies have lost much of their usefulness to advertisers, largely because of cookie blockers.
With the end of the Cold War and the breakup of the Soviet Union (1991), neutralism lost much of its usefulness as a guiding principle in many nations' foreign relations.
Arguably, much of the usefulness provided by a digital mailing system has been offloaded to online banking and its associated bill pay features, now common.
Much of the usefulness of nonstandard analysis stems from the fact that within it every statement of ordinary analysis involving limits has a succinct and highly intuitive translation into the language of infinitesimals.
Various abortive proposals were made to extend the line, whose dead-end nature deprived it of much of its usefulness.
To date, however, we are none the wiser regarding the sensitivity, specificity, or cost effectiveness of this screening tool for SARS, much less its usefulness for influenza.
