Denmark might be eliminating paper money
The Danish government is considering eliminating paper money from its currency. In Denmark, many banks don't carry cash and the central bank no longer prints bills or makes coins. Forcing people to pay for things electronically will make it very difficult for tax-evadors and illegal transactions (all transactions will have documented "paper" trails).
Critics of the program point out the privacy issues of an electronic-only system. The public will most likely feel uncomfortable with the government knowing where they're spending their money.
Other countries may follow suit in the near future, starting with the elimination of bills worth $100 or larger, since they aren't crucial in daily comerce.