From Isaac Kaplan at Artsy.  The list includes the Masterpiece Cakeshop Supreme Court case, Graham v. Prince, the Berkshire Museum lawsuits, the Guelph Treasure case, and the long-running Von Saher v. Norton Simon Museum.
UPDATE:  Brian Frye tweets:  "Interesting list. But I’m a little skeptical that Masterpiece Bakeshop will have much effect on the artworld, no matter how it is decided."  Sergio Muñoz Sarmiento responds:  "Agree on Masterpiece, but SCOTUS may do what art historians and critics do not--opine on what is and isn't art and expression. I hope."