TSA facial recognition will be mandatory?

Just went through security at LGA, and the agent gave me an attitude when I requested to opt out of facial recognition photo. They also said, "just so you know, when Real ID goes into effect, the photo will be mandatory". I'm curious if anyone has heard similarly? Will we be required to participate in TSA's facial recognition technology once Real ID goes into effect?

agent effect facial facial recognition goes opt out photo privacy real real id recognition security tsa