Here are some good posts about the lasting importance of the Reformation:

What We Can Learn from the Reformation 500 Years Later – Stephen Nichols (Crossway)

What is Sola Scriptura Protecting Us Against? More Than You Think – Michael Kruger

Ten Lasting Fruits of the Reformation – Joel Beeke

The Luther Family and the Reformation of Marriage – Jeff Robinson (TGC)

The Reformation’s Evangelistic Impact – Gregg Allison (Crossway)