Television won’t be able to hold on to any market it captures after the first six months. People will soon get tired of staring at a plywood box every night.
Meaning of the quote
Darryl F. Zanuck, an American director, thought that television would not stay popular for long. He believed that people would quickly get bored of watching a wooden box every night and would stop watching it after about six months. Zanuck did not think television would continue to be a successful way to entertain people for a long time.

About Darryl F. Zanuck
Darryl F. Zanuck was an influential American film producer and studio executive who played a major role in the Hollywood studio system. He produced three films that won the Academy Award for Best Picture during his tenure at 20th Century Fox.
More quotes from Darryl F. Zanuck
If two men on a job agree all the time, then one is useless. If they disagree all the time, then both are useless.
American film producer (1902-1979)
Television won’t be able to hold on to any market it captures after the first six months. People will soon get tired of staring at a plywood box every night.
American film producer (1902-1979)