"I don't think anyone could have foreseen the difficulties we encountered in the production of the blue laser diode for the PlayStation 3, which ultimately delayed the launch of PlayStation 3," Hirai said. "We were asking our teams to develop millions of components for the PlayStation 3, like the Blu-Ray disc player and cell broadband engine, that had previously only been produced in the thousands."
Hirai also made clear the advantage that using Blu-ray media for games has over using the DVD format, which Microsoft chose for the Xbox 360. "I have heard people say that a high-capacity game delivery vehicle like Blu-ray isn't necessary in a next generation computer entertainment system. You just can't expect that 9GB of storage capacity found on today's DVDs are going to have enough space to hold tomorrow's games," he said.
Source:
GamesIndustry.biz