Microsoft wouldn't admit to it, if they did it's anti-trust. They know all too well about anti-trust.
No company would admit to it.
Thats absurd. Microsoft is a publicly traded company...and their cash cow is the Operating System business.
The fact is the Blu-Ray group made terrible engineering decisions that are haunting them.
Way too aggressive on how much data they're trying to pack-in on a single layer. This made it harder on the disc yeilds. Also this caused the need for a scratch resistance coating. Also the optics are more costly because the laser beam has to focus with more precision.
Toshiba was willing to work with the Chinese manufactures without hesitation. Hence the HD-DVD standard has a variant for China so in time the electronic guts will be the same for the Chinese home market. This will add a lot of economy of scale.
Then despite Sony wanting HDi, Java was adopted by the Blu-Ray group to appease FOX. Even Apple wanted HDi, and Disney worked with Microsoft to create the standard. Java so far has been a disaster for the Blu-Ray format.
Then the big trojan horse that is the PS3 has been given the cold shoulder by consumers. Microsoft didn't force Sony to include Blu-Ray.
The only people accountable for the poor situation Blu-Ray is in are the members of the Blu-Ray group. Despite having a huge install base thanks to the PS3, sales barely inch past HD-DVD. The movie disc attach ratio for HD-DVD players is incredible in comparision to the base of Blu-Ray players.