Each biometric modality has unique strengths and weaknesses, and has the potential to improve on the password approach.
Face and voic are fast but not universally usable.
Gesturs is reliably performed and worked for everyone, but a much shorter gesturs would be needed to achieve a competitive time, posting a challenge to gesture recognition algorithm. The memory task context provides further insight into the broader impact of authentication,and demonstrates a significant advantage for face, and a lesser advantage for voice in supporting memory task performance.