Much, much more important things that will actually lead to sales then that ap. Rich is correct, that is a gimmick at best.
I use a tablet when I travel. When I am away from my desk top or laptop. When I shop, I do it from my desktop computer. So much easier. I have not seen one single application for that ap. When I show art when I travel, I am not in the buyers room to project the image.
I would rather the time and money be spent on developing more products to sell.