Some of the current and practical areas where biometric authentication technologies are at work include the following:

• Border and immigration
• Workforce management
• Criminal identification
• Airport security
• Time-keeping and attendance
• Law enforcement
• Access control and Single Sign On (SSO)
• Banking

All indications are that this technology will continue to grow and mature as apparent in the article Use of Biometrics Across the Globe by John Trader of M2SYS Technology (http://www.m2sys.com/blog/biometric-hardware/top-5-uses-biometrics-across-globe/amp/).

From a financial perspective, according to the Security Industry Association (SIA), the market for electronic access controls in the USA alone is expected to top 4.47 billion in 2019 (up from just over 3 billion in 2014).

To further make the case for biometric authentication, an online article, Millennials Accelerating the End of the Password Era (January 29, 2018, by Limor Kessem), we see that although password use is not popular, when logging into applications security is the biggest (by far) concern for users (https://securityintelligence.com/new-ibm-study-consumers-weigh-in-on-biometrics-authentication-and-the-future-of-identity/).