But legitimate questions remain as to whether they will ever truly replace their leathery counterparts.
Legitimate questions would be much less like "Is water wet?" or "Does the Mayan calendar not actually predict the obliteration of the Earth in 2012?" or "Will Apple and Google and a few million /.ers running Kubuntu drive Microsoft into irrelevance and bankruptcy by 2015?"
The physical wallet is not going away. As long as there are legal purchases for which many people would prefer to have plausible deniability, there will be cash. Until the final merger that yields AppFedGoocrosoft, L. L. C., Our Beloved Planetary Government, (with 51% of voting shares held by Goldman-CitiSachs of America, and the financial equity held mostly by the Bain/Koch Group and the LDS Church Inc.) those of us not standing in line to be rendered into spare parts and raw biodiesel input will need some way to hold a half-dozen competing trackable-money tokens, a dozen merchant "savings club" cards, blank bits of thermal paper that used to be receipts we thought we should keep, and enough paper money for a Big Mac, a USA Today, a pack of smokes, and an hour of high-res porn on the medium du jour.