Back in the late 70's and early 80's when Atari started the home console revolution Nolan Bushnell founder of the company made sure that he has exclusive contracts with all five of the companies on the planet that could make the chips needed for production of a home console. This blocked competition for years, but when the company was sold to Warner Communications the new company didn't see any point in spending $50,000 to $100,000 a year in keeping those contracts so this brought rise to competition.
Anyway Microsoft is doing a similar thing. They Just Announced that they have exclusive next generation rights to both FIFA 07 and Pro Evolution Soccer 6. So although both these games are coming out for current gen consoles as well, they will not be making an appearance on the PS3.
This is going to make a huge dent in PS3 sales in the UK and other Football loving nations.