How will this make U.S. flights more secure?

Facial recognition capabilities will improve the performance and security of TSA operations by increasing assurance of traveler identity beyond what current manual processes alone can provide. Biometrics can enable TSA to automate part of the current manual procedures and reinvest screening personnel time saved into performing other critical security tasks and biometric error resolution. In the future, improved screening processes may enable TSA to use biometrics to retrieve pre-screening information to support TSA decisions on the level of screening that passengers and their baggage will receive.