The U.S. Supreme Court refused Monday to consider a legal challenge by television networks and Hollywood studios to Cablevision Systems Corp.'s next-generation digital video recorder, clearing the way for the cable company to offer the new service this year. The networks and studios argued that Cablevision's new remote-storage DVR violated federal copyright laws. Cablevision's service would allow customers to record and store television shows on central computer servers maintained by Cablevision instead of having to record them on expensive DVR cable boxes installed in their homes. Cablevision says the system would allow it to provide DVR services at lower costs,...