Yes. Someone with their biometrics on file who is crossing by car at the land border will be able to go into the facility and have their biometrics confirmed that way.
Most of the traffic for Canadians and Americans, of course, will just continue at pace as it does now, but if it's a third country national with biometrics on file, the equipment will be made available inside facilities so that when there are questions about identity, those can be quickly, efficiently, and accurately cleaned up with a quick verification.