They won't. HD-DVD is going out of business- starting this April or May, they won't be making them anymore. That means Blu-Ray has won the battle. Xbox 360 however will not adapt to the Blu-Ray format because it is a product of Sony. And I don't think Microsoft will want to include Blu-Ray players in their 360s because that's pretty much accepting defeat against Sony. They'll probably come up with something of their own.