A report on Forbes today notes that research firm Piper Jaffray has said that Apple would “would be the primary beneficiary” resulting from a US Supreme Court decision (due today) against peer-to-peer (P2P) file sharing. “We believe a decision against P2P file sharing would be positive for online content distribution companies, as a slowdown in P2P activity would likely lead to a pick-up in sales for legitimate online content providers,” the firm said in the report. Update: The US Supreme Court has ruled that file-sharing services may be sued.