Chips in the hand or forehead is an eventuality... I should know because I work for a company that is trying to develope such an item. Why? Look at the advantages: No more printed money (hence no counterfeiting to worry about). In fact no need at all to carry money--chip can be scanned as easily as a debit card. Chip also will carry all medical information for persons needing immediate medical attention, all personal information (arrest history, etc.) so police and other officials know immediately about persons in custody (instant check). Chip will prove instant citizenship and will be a useful tool for employers in considering new hires.
I'm not saying I advocate such an item but it's coming and we might as well get used to it!