Reason Ms is silent is because they have no money to make off 3D.
The best dividens they could hope for by introducing 3D is to boost sales of the console slightly. However to do that, they have to make it a lot more user friendly than PS3.
There are 6 million existing 3D TV owners who can't use the PS3, not because their TV is not capable of showing 3D which PS3 is outputting...but because PS3 will not even turn 3D on unless your TV has HDMI 1.4.
There are also many millions of 120 hz monitor owners, CRT owners and projector users who can do 3D gaming but are left out in the cold for with the PS3 since it requires HDMI 1.4.
If 360 is able to introduce 3D which works for these users, it will easily make a bigger impact than PS3, which requires you to buy a brand new TV.
