The children asked me why the sales of projectors were so low in the 1990s. How do you answer?

Hello, in those days, people's material life was not rich enough, and most people might not even have enough food and clothing. Many people probably don't even have a color TV at home, and the projector technology in those days is definitely not as good as the current technology, and there is no Android system, which is very inconvenient to use at home.