Ah, here's a topic I haven't posted about for a couple of years: "a video display at the Mall of America that looks and sounds like a real Best Buy employee." (YouTube, via AdRants).
Here's a look at the tech behind it by Modernistic: "This digital projection signage system uses a screen to capture all available projected light. The screens can be custom cut into any shape. We also make screens in a self-adhesive film that can be applied to windows, transparent partitions, free standing, countertop and hanging panels. The projected image has a multi-dimensional look."
Stereoscopic Advertising: Part II, Part I