Is TSA planning to test this technology in other airports? If so, which airports and when?

Currently, TSA is testing curb-to-gate biometrics for identity verification with CBP and Delta Air Lines at Terminal F at Hartsfield–Jackson Atlanta International Airport (ATL). Testing began in October 2018 and TSA is continuing to evaluate the use case of leveraging biometrics for a seamless identity verification process across multiple airport touchpoints, including check-in, bag drop, checkpoint and boarding. Future tests at additional airports have not been determined at this time.