2013-2018: Face recognition to grow faster than biometrics as a whole

The global biometric market is expected to grow slowly at an estimated Compound Annual Growth Rate (CAGR) of 22.9% as compared to the facial recognition market growth of 27.7% during the forecasted period of 2013 to 2018. (Markets & Markets)

Plenty of other good data points at the link. Make sure you hit the “Summary” tab.