It’s a demo of a concept. I’d wager money that we’ll never see an actual product from Microsoft that works like this.
I think the Courier demo is really, really neat. Watching that video makes me want one, now. Unfortunately it will never be as cool as what we’re seeing in these videos.
That’s a big difference between Apple and other tech companies. They demo a product a few months before it ships, in it’s near final form. Microsoft announces products years beforehand and by the time it arrives it’s behind the curve.