Forget about what's in your wallet. The real question is: will you even need a wallet? The latest trend in credit card payment technology is the use of mobile wallets. This innovation eliminates the plastic and turns your phone into a digital payment portal. From MasterCard to PayPal, major payment processors are jumping on the bandwagon and offering their own mobile wallet apps. Is this really the wave of the future? According to some indications, we may be heading toward not only a cashless society but a plastic-less one as well.