This is an interesting idea but from the point of view of ergonomics how much of an improvement is it from a simple stick ? I am finding it difficult to image a

This is an interesting idea but from the point of view of ergonomics how much of an improvement is it from a simple stick ? I am finding it difficult to image a blind person keeping hands in folded position all thorough the day. I think a more practical approach might be a similar setup with a mobile phone in pocket ( similar to her movie ? )