I was sort of joking in my previous comment, but since you mentioned it, I’ve actually seen an interesting use for selfie sticks: third-person video. I saw a video of someone putting the selfie stick over his shoulder facing forward to where he himself was looking, and creating a third-person video that way; it recorded everything he saw as he walked, but you could also see the back of his head and shoulders himself as he moved forward. I thought that was pretty cool.