After the success of the LP record, Goldmark spent the next two decades at CBS Laboratories working on various inventions, chief of which was EVR, the Electronic Video Recorder. This futuristic home video playback device used reels of film stored in plastic cassettes to electronically store audio and video signals, and was first announced in 1967. A B&W prototype was demonstrated in 1969 (promising color playback in future models), but the invention floundered when it proved to be difficult and costly to manufacture. CBS was also concerned about the potential of competition from home video devices, particularly those that could record — a fear that eventually proved prescient. As with color television, Goldmark's EVR film-based system was superseded by another technology, in this case Sony's U-Matic 3/4" videocassette format in late 1971, since the cassette tape format was cheaper and more effective. However, Goldmark's vinyl long-playing records remained the standard in the music industry until the CD replaced the LP in the late 1980s.