It may be of limited use knowing what you look like and your name in a SAR situation, I think mostly it would be a psychological benefit on my part (they know what I look like and who I am), though it might help personify you to the rescuers somewhat as well, which may be of some use too.
Or to identify your body if SAR takes a while? but that wouldn't happen to us 'cuz we're smart enough to signal our position. <img src="/images/graemlins/grin.gif" alt="" />