While the item doesn't really do more than you can do with a large digital screen, I think the physical drawing aspect provides an appeal not seen in projected images. Also, if you have canvas or paper on the wall, you can end up with a physical object that can be taken by your spectator assistant. It isn't really any sort of breakthrough especially as it would be used by magicians, but I think it will offer a particular appeal due to the drawing style and the opportunity to have a hard copy.
It is a crowdfunded project at this point which makes me wary, but that is the only way to get it for now. I guess if the campaign is successful then it may be marketed further.
https://www.youtube.com/watch?v=0ZrzQYzWq68
They have many more videos on their youtube channel if you want to see more.