The problem with 3D pictures is needing something to view them on. I've heard of one phone from maybe a decade ago that had a full 3D display that could be viewed from a wide range of angles, but it cost way too much and heavily sacrificed display resolution. Without widespread adoption, it's doomed to be mostly a gimmick. Some would argue that it'll always be a gimmick, but I think if it was widespread it'd basically be like high resolution i.e. an enhanced way of looking at content. Maybe not mindblowing after you're used to it, but worthwhile if it can be done without sacrificing too much.