Page:United States Reports, Volume 545.djvu/1000

 , J., concurring Even if the absolute number of noninfringing files copied using the Grokster and StreamCast software is large, it does not follow that the products are therefore put to substantial noninfringing uses and are thus immune from liability. The number of noninfringing copies may be reflective of, and dwarfed by, the huge total volume of files shared. Further, the District Court and the Court of Appeals did not sharply distinguish between uses of Grokster’s and StreamCast’s software products (which this case is about) and uses of peer-to-peer technology generally (which this case is not about).

In sum, when the record in this case was developed, there was evidence that Grokster’s and StreamCast’s products were, and had been for some time, overwhelmingly used to infringe, ante, at 922–924; App. 434–439, 476–481, and that this infringement was the overwhelming source of revenue from the products, ante, at 925–926; 259 F. Supp. 2d, at 1043–1044. Fairly appraised, the evidence was insufficient to demonstrate, beyond genuine debate, a reasonable prospect that substantial or commercially significant noninfringing uses were likely to develop over time. On this record, the District Court should not have ruled dispositively on the contributory infringement charge by granting summary judgment to Grokster and StreamCast.

If, on remand, the case is not resolved on summary judgment in favor of MGM based on Grokster and StreamCast actively inducing infringement, the Court of Appeals, I