In the web and other platforms, since the application is not going to the user through an application store, the feedback is personal to the application team. User feedback is not visible to other users, and they get to judge and use it as they see fit.
In mobile devices, users can give feedback on the application store and if the application does not live up to the expectations of users, it gets bad ratings that hurt the application in a big way. This sort of quick and visible feedback can help an application take off, or see it fail miserably if users don't like it. Acting on such feedback becomes very important in mobile DevOps.