The short answer: nothing.
Actually, not having an African or Latin American pope probably helps our missionary effort in those areas (the reasoning being that a "local" pope may have reenergised lapsed and former Catholics who might otherwise be attracted to Mormonism).
As soon as I heard I rushed to find my Catholic friend to tell him. The crushing look of disappointment on his face was unforgettable. "We need a pastoral not a doctrinal pope", he said. "Plus, he’s German."
Congratulations to Pope Benedict XVI from BCC. We know you read us.