When I worked at B&N they actually piloted those. I guess they weren’t happy with the results because it (clearly) didn’t last. Anecdotal, but it also didn’t seem to help all that much. The kiosks would benefit some people, but you’d still get a ton of people coming to an employee because they still couldn’t find the book where it was supposed to be, or they couldn’t find the actual section itself, especially if it was a smaller one. The kiosks didn’t help at all for the “what’s the book with the dog who becomes an astronaut?” type questions, or the “I’m looking for something for my niece who is thirteen and having a birthday next week, what do you recommend?” ones.