Okay, watched the video and... well... none of it seems particularly interesting (and also none of it has anything to do with enhanced or additional senses, and thus I am disappoint). There's not precision or potential precision for any of it, and I honestly don't see projection technology getting this popular, for a whole bunch of reasons.
And it looks like it would be really expensive for something with minimal benefit. There are some interesting bits, of course, but none of it has anything particularly to do with the tech he's putting forth.
Are you talking about "the sixth sense" as using projection technology, or Augmented Reality? Using projection as display interface is never a major method in AR research. (Which is why the demo is more of a show than real application, and old news, it require too much new hardware) The beauty of using AR in smartphone is that its doesn't need any extra hardware at all. All you have to do the the background service support and software only, and it can profit using commercials or monthly fee. The reason why ambient intelligence works, it that the sensor will determine where you are, and what you are doing.
Example : imagine you are on the street, and want to eat dinner. You can use integrated AR techs to find the price and directly pointed which restaurant sold what food at which price, telling you how to go there as quickly as possible, and even getting opinions with social network from your friends in real time. Or finding the nearby people who also want to eat there and form a temporary party group to buy at discount price. And you just need to download app into your phone. I don't see this won't growing to become a great and new way of interacting with the world (and people), and it's already happening at some level. (Look how many time people already loose their ability to navigate without GPS. And with the new app on smartphone, tweeting on their phone to get opinions, it can do much more than pointing directions). It's going to be more common when smartphone are dominating cellphone market, and the more accurate sensors to pinpoint your location within 1 meter even indoor.