Microsoft (along with lots of other companies) have put together lots of great concept videos in the past. I've seen amazing concept videos from MS, Sony and Orange (UK mobile operator company) over the last 10 years.
Making a concept video or having a group of talented people with a good vision doesn't mean the corporation is actually going to deliver on that vision. You can bet every big company has a load of talented people with great ideas and talent inside it. But the machinery and politics of the big company pretty much dictate the really groundbreaking ideas aren't going to make it out of the R&D lab.
It is not clear to me what concepts in this video are. There's lots of touch-screen-y stuff and shared screens.
But given that tablet technology has not proved its usefulness where it is available, I'm not sure if making more common would make it more useful.
Sure, it's nice to see a video of programs responding to a gesture according to what the person apparently wants. No one has yet created an environment where that happens (the iPhone GUI is a perhaps closest).
Making a concept video or having a group of talented people with a good vision doesn't mean the corporation is actually going to deliver on that vision. You can bet every big company has a load of talented people with great ideas and talent inside it. But the machinery and politics of the big company pretty much dictate the really groundbreaking ideas aren't going to make it out of the R&D lab.