The vibe I got from the book, which is why I asked the OP's opinion was that Steve Jobs did not believe in their movie business, his vision was that Pixar would

The vibe I got from the book, which is why I asked the OP's opinion was that Steve Jobs did not believe in their movie business, his vision was that Pixar would market computers capable of producing Pixar-level graphics to ordinary consumers. He didn't see Pixar as a movie studio. But the folks at Pixar wanted to make movies. So what they did was convince him that by doing work on movies and commercials, they could advertise the capabilities of their tools. Eventually, they were able to buy enough time to get their work recognized and the Toy Story deal going which validated their vision and won Steve Jobs over to the movie studio idea.