Sure. I think my (perhaps badly made) point was - There are two existing technologies already in use at borders, each of which have similar or better accuracy than facial recognition, so the additional benefits of deploying it there is likely to be small.

Unless, as pointed out by bdhess in another response to my comment, the aim is to detect people for whom border control do not have any passport/fingerprint/retinal information for, but some reason still consider to be a "person of interest" at a border. Which has it's own set of scary implications...