You are not missing much. I am in one of these states and have set it up. At the moment there literally are only some very specific TSA airport checkpoints that can use them. So it only would use useful if you are flying from stay Phoenix to Baltimore. Even then you still need you physical wallet card in case your plane is assigned to a gate that might be on a different checkpoint that does not have this capability.

The state cops don’t know about these for Terry stops, let alone retail, restaurants, bars which might need to check ID.