I have seen these in action. They are pretty novel. The image is very catching but the quality is very low res - around 38 pixels per inch by my quick math.
However, they are loud - its basically a fan without any aerodynamic profile. Also, I think they are fragile. It would be best used in a display out of reach.
I didn't get into programming. but it seems that having the right content/black background is key.
In the end, I thought it was a nice accessory to good quality video - An "attract" to get someone's attention from across the room. but not something you would want to focus on or scrutinize.
Bart