PS3 was an influence...
James Gianopulos, co-chairman of Fox, has said that the PS3’s Blu-Ray ability was an influence on the company’s decision to support the format. He says that the number of companies involved with Blu-Ray and the PS3’s undoubted popularity were an influence in the decision.
Companies supporting the rival HD-DVD format claim that Blu-Ray to be less cost effective than HD-DVD to produce whereas the Blu-Ray camp say that their format is technically superior.