"We're searching for partners in the industry to bring it as a new product," said Paul Chojacki, in charge of interactive media for the Fraunhofer Heinrich Hertz Institute. "We have some bigger companies in Germany who are interested in this," he said, although he didn't say which ones.

Before the system is ready for a commercial debut there are still some bugs that need to be worked out. For example, the pointer will sometimes jump around the screen, or something will be selected that wasn't intended.

Chojacki said one of the biggest challenges was making sure the motion tracking system filtered out reflections on the store front glass.

"The window is a problem for us because it's reflecting light and pictures," he said. "We found a solution that is working very well right now."

Another problem for the team will be teaching passers by how to use the system because it isn't all that intuitive. Users have to stand in exactly the right spot and make gestures in a defined area for the motion tracker to see them.