Augmented Reality is the practice of overlaying graphics on top of realtime events or camera feeds. Printed symbols, such as the example above can be used a reference points for the virtual content to be mapped correctly to the real world orientation. Here is an online application of this same technique used in an ad campaign for beef jerky (link). And the above video is from the same company and is available as a demo here.
This clip involves experimental projection directly on to the surface of objects.
Minority Report has become synonymous with haptic or virtual touch based interfaces.
And here is another example of augmented reality used for advertising. The first using the same printed reference image for tracking as the above demo. In this case it for G.E. to advertise wind and solar power. And below is an example of camera tracking of eye/head motion to superimpose helmets from the movie Ironman 2.