There is still a need for cash, and itseems implausible that the infrastructure that makes digital transactions possible will be reliable enough to be completely trusted for a long time.
While it is hard to get reliable statistics for tablet sales, a survey by YouGov seems to show that the Kindle Fire came from nowhere to challenge for the lead over the festive season.
It may not have been intended that the 1991 Road Traffic Act would be used as a new, reliable funding stream by local authorities in order to help their budgets, but it certainly seems as though it is to many of us.