This is a creative idea, and is one version of the common one of putting holes in tubes, either horizontal or vertical towers, for strawberries. But it's not clear what the value of this is compared to a hanging open planter bed -- one in which the whole surface of the bed is exposed to the air. That is, without holes, like a gutter. In that kind of a design, the strawberry runners can root, and the bed can develop. With holes in a tube, runners won't get to root. Nowhere to go. Also, with an open bed, I would think it could be watered and fertilized more confidently. That being said, I guess the holes-in-tubes idea minimizes soil contact for the berries, which could be considered a benefit.