I dont know if im advancing too fast, but in the future we will do all transactions online without the need anymore of the printed money, besides that i do believe we will have internet acess for free, companies will sell just computers and digital equipments.
Real Money will always be paper and digital for use on a network. There is much debate on the subject, just much talk seriously about bitcoin such as international currency very early and premature.
Paper money never replace with anything, but for quantity will be decrease because still use for small transactions. Electronic money will replace for big transactions, so the future all peoples will have account number to save their money.