You really need a use case for it for it to catch on. All the demos MS was showing were unnecessary sugar. There's no real use case that a monitor with a 3-D graphics card can't already do. People do 3-D modeling just fine on a computer.
And then you have the problem of being required to actually wear it. That already limits your market. No one is going to want to wear a headset all day, because fashion supersedes everything in life, so that makes things like Skype out of the question. Besides, Skype works just fine on your mobile phone.
This is going to go the way of the Kinect. Nice technology and concept, but very little use. And nothing necessary. Kinect has had many years of development behind it already, but really no new concepts for it.
I'd like to see something that shows you NEED this.