In his homily, Pope Francis called the pair, "men of courage" saying, "they lived through the tragic events of that century, but they were not overwhelmed by them. For them, God was more powerful, faith was more powerful."
Some have taken issue with those words especially in reference to John Paul II as many see his inaction during the height of the abuse scandal as his primary legacy, however to millions of people John Paul II was the "Pope of the Family" and is still widely popular amongst Catholics and non-Catholics alike.
Pope John XXIII is most widely remembered for calling the Second Vatican Council which brought the "church to the people." For the first time the Church officially sanctioned Mass to be conducted in local and vernacular languages rather just Latin.
Whether or not you agree with their canonization, or even in the idea of sainthood at all, it is difficult to argue the point that these two men had an indelible impact on Church and the path it has taken and will continue to take into the 21st Century.
The Catholic Church, while not having the same political power it did during the Medieval or Renaissance period, its reach can still be felt around the world and it can be extremely influential in issues related to social inequality and social justice.