Bio-metrics are fine in some areas, but aren't great solutions in clinical areas due to infection control.
I do believe that there are areas where bio-metrics do make sense, especially around drug prescribing and dispensing.
Smart cards and RFID make more sense for user access control
The lack of consensus standards for biometrics, as well as the wide variety of biometric measures, makes a mandate problematic -- especially a Federal mandate. Even If the US could decide on what biometrics to use, and what vendors' system to bless as "standard", I doubt that international consensus would occur easily.
It is reasonable to expect a 5+ year lead-time to gain such consensus once agreement is reached to pursue that goal. Even then, biometric identification for populations will remain elusive, even after authentication based on pre-registered biometric data is economically feasible.