This is absolutely an impressive demo, but the way to look at it is as a 'mash-up' of a variety of components that have all been demoed before in isolation and usually with a lot more attention to the technology behind it but a much less slick presentation.

So kudos to the people that put this together but it is mostly the mashup that is new, not the individual pieces and those pieces have demos all their own that make for very interesting reading and viewing (where applicable).

I should do a blog post on this, but that will be a ton of work to properly represent the state of the art (which this demo does not).