quote from the court's decision:
"The introduction of new technology is always disruptive to old markets and particularly to those copyright owners whose works are sold through well-established distribution mechanisms," the court wrote. "Yet history has shown that time and market forces often provide equilibrium in balancing interests, whether the new technology be a player piano, a copier, a tape recorder, a video recorder, a personal computer, a karaoke machine or an MP3 player. Thus, it is prudent for courts to exercise caution before restructuring liability theories for the purpose of addressing specific market abuses, despite their apparent present magnitude."

The the full article here