Really, this is no big deal. If Benedict were to abolish the bastard protestant rite, the NO, and indefinitely say the Tridentine Mass, i could see us getting excited.
But lets remember the words of Bishop Williamson, that the Faith is greater than the Mass. Because we may be saved without the Mass but cannot be saved without the Faith. Benedict may say a Mass, but does he have the Faith ? Would he be recognized as Peter to any other Catholic prior to the reformation within the Church ? I think not.